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1421233440 = 2535111931457
BaseRepresentation
bin101010010110110…
…0100110100100000
310200001022010202120
41110231210310200
510402313432230
6353005544240
750135166504
oct12455446440
93601263676
101421233440
1166a2817a0
12337b75080
131985a4443
14d6a7c304
1584b8b310
hex54b64d20

1421233440 has 384 divisors, whose sum is σ = 5318369280. Its totient is φ = 315187200.

The previous prime is 1421233393. The next prime is 1421233487. The reversal of 1421233440 is 443321241.

It is an interprime number because it is at equal distance from previous prime (1421233393) and next prime (1421233487).

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a self number, because there is not a number n which added to its sum of digits gives 1421233440.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 3109692 + ... + 3110148.

It is an arithmetic number, because the mean of its divisors is an integer number (13849920).

Almost surely, 21421233440 is an apocalyptic number.

1421233440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1421233440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2659184640).

1421233440 is an abundant number, since it is smaller than the sum of its proper divisors (3897135840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1421233440 is a wasteful number, since it uses less digits than its factorization.

1421233440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 536 (or 528 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 1421233440 is about 37699.2498599110. The cubic root of 1421233440 is about 1124.3162106411.

Adding to 1421233440 its reverse (443321241), we get a palindrome (1864554681).

The spelling of 1421233440 in words is "one billion, four hundred twenty-one million, two hundred thirty-three thousand, four hundred forty".