402641729928 has 64 divisors (see below), whose sum is σ = 1133770516800. Its totient is φ = 132375358080.

The previous prime is 402641729879. The next prime is 402641729939. The reversal of 402641729928 is 829927146204.

It is a happy number.

402641729928 is a `hidden beast` number, since 402 + 64 + 1 + 72 + 99 + 28 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

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, 12751918 + ... + 12783453.

It is an arithmetic number, because the mean of its divisors is an integer number (17715164325).

Almost surely, 2^402641729928 is an apocalyptic number.

It is an amenable number.

402641729928 is an abundant number, since it is smaller than the sum of its proper divisors (731128786872).

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

402641729928 is a wasteful number, since it uses less digits than its factorization.

402641729928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25535459 (or 25535449 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 402641729928 in words is "four hundred two billion, six hundred forty-one million, seven hundred twenty-nine thousand, nine hundred twenty-eight".