40432257920 has 32 divisors (see below), whose sum is σ = 96658368120. Its totient is φ = 16172902912.

The previous prime is 40432257919. The next prime is 40432257941. The reversal of 40432257920 is 2975223404.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (32).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 31587062 + ... + 31588341.

Almost surely, 2^40432257920 is an apocalyptic number.

40432257920 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40432257920 is an abundant number, since it is smaller than the sum of its proper divisors (56226110200).

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

40432257920 is an equidigital number, since it uses as much as digits as its factorization.

40432257920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63175422 (or 63175410 counting only the distinct ones).

The product of its (nonzero) digits is 120960, while the sum is 38.

The spelling of 40432257920 in words is "forty billion, four hundred thirty-two million, two hundred fifty-seven thousand, nine hundred twenty".