421154200440 has 256 divisors, whose sum is σ = 1410670800000. Its totient is φ = 111763390464.

The previous prime is 421154200427. The next prime is 421154200451. The reversal of 421154200440 is 44002451124.

421154200440 is a `hidden beast` number, since 4 + 2 + 1 + 15 + 4 + 200 + 440 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 289850754 + ... + 289852206.

Almost surely, 2^421154200440 is an apocalyptic number.

421154200440 is a gapful number since it is divisible by the number (40) 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 421154200440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (705335400000).

421154200440 is an abundant number, since it is smaller than the sum of its proper divisors (989516599560).

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

421154200440 is a wasteful number, since it uses less digits than its factorization.

421154200440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591 (or 2581 counting only the distinct ones).

The product of its (nonzero) digits is 5120, while the sum is 27.

Adding to 421154200440 its reverse (44002451124), we get a palindrome (465156651564).

The spelling of 421154200440 in words is "four hundred twenty-one billion, one hundred fifty-four million, two hundred thousand, four hundred forty".