402489959888 has 40 divisors (see below), whose sum is σ = 801994128168. Its totient is φ = 195538586112.

The previous prime is 402489959831. The next prime is 402489959909. The reversal of 402489959888 is 888959984204.

It can be written as a sum of positive squares in 4 ways, for example, as 249192652864 + 153297307024 = 499192^2 + 391532^2 .

It is a Harshad number since it is a multiple of its sum of digits (74).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29831 + ... + 897702.

Almost surely, 2^402489959888 is an apocalyptic number.

It is an amenable number.

402489959888 is a deficient number, since it is larger than the sum of its proper divisors (399504168280).

402489959888 is a wasteful number, since it uses less digits than its factorization.

402489959888 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 928311 (or 928305 counting only the distinct ones).

The product of its (nonzero) digits is 477757440, while the sum is 74.

The spelling of 402489959888 in words is "four hundred two billion, four hundred eighty-nine million, nine hundred fifty-nine thousand, eight hundred eighty-eight".