1408243440 has 80 divisors (see below), whose sum is σ = 4414672800. Its totient is φ = 371306496.

The previous prime is 1408243427. The next prime is 1408243547. The reversal of 1408243440 is 443428041.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1408243398 and 1408243407.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11605 + ... + 54324.

It is an arithmetic number, because the mean of its divisors is an integer number (55183410).

Almost surely, 2^1408243440 is an apocalyptic number.

1408243440 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 1408243440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2207336400).

1408243440 is an abundant number, since it is smaller than the sum of its proper divisors (3006429360).

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

1408243440 is a wasteful number, since it uses less digits than its factorization.

1408243440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66034 (or 66028 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 30.

The square root of 1408243440 is about 37526.5697872854. The cubic root of 1408243440 is about 1120.8803240373.

The spelling of 1408243440 in words is "one billion, four hundred eight million, two hundred forty-three thousand, four hundred forty".