64899402 has 32 divisors (see below), whose sum is σ = 138062400. Its totient is φ = 20279808.

The previous prime is 64899391. The next prime is 64899437. The reversal of 64899402 is 20499846.

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, 8124 + ... + 13992.

It is an arithmetic number, because the mean of its divisors is an integer number (4314450).

Almost surely, 2^64899402 is an apocalyptic number.

64899402 is an abundant number, since it is smaller than the sum of its proper divisors (73162998).

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

64899402 is a wasteful number, since it uses less digits than its factorization.

64899402 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5990.

The product of its (nonzero) digits is 124416, while the sum is 42.

The square root of 64899402 is about 8056.0165094170. The cubic root of 64899402 is about 401.8650446723.

The spelling of 64899402 in words is "sixty-four million, eight hundred ninety-nine thousand, four hundred two".