402403431320 has 32 divisors (see below), whose sum is σ = 987717514320. Its totient is φ = 146328520320.

The previous prime is 402403431307. The next prime is 402403431347. The reversal of 402403431320 is 23134304204.

It is a self number, because there is not a number n which added to its sum of digits gives 402403431320.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 457276187 + ... + 457277066.

Almost surely, 2^402403431320 is an apocalyptic number.

402403431320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

402403431320 is an abundant number, since it is smaller than the sum of its proper divisors (585314083000).

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

402403431320 is a wasteful number, since it uses less digits than its factorization.

402403431320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 914553275 (or 914553271 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 26.

Adding to 402403431320 its reverse (23134304204), we get a palindrome (425537735524).

The spelling of 402403431320 in words is "four hundred two billion, four hundred three million, four hundred thirty-one thousand, three hundred twenty".