402889836 has 12 divisors (see below), whose sum is σ = 940076312. Its totient is φ = 134296608.

The previous prime is 402889793. The next prime is 402889841. The reversal of 402889836 is 638988204.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16787065 + ... + 16787088.

Almost surely, 2^402889836 is an apocalyptic number.

It is an amenable number.

402889836 is an abundant number, since it is smaller than the sum of its proper divisors (537186476).

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

402889836 is a wasteful number, since it uses less digits than its factorization.

402889836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33574160 (or 33574158 counting only the distinct ones).

The product of its (nonzero) digits is 663552, while the sum is 48.

The square root of 402889836 is about 20072.1158824873. The cubic root of 402889836 is about 738.5764182287.

The spelling of 402889836 in words is "four hundred two million, eight hundred eighty-nine thousand, eight hundred thirty-six".