64039398 has 16 divisors (see below), whose sum is σ = 128796480. Its totient is φ = 21226856.

The previous prime is 64039379. The next prime is 64039399. The reversal of 64039398 is 89393046.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64039399) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28740 + ... + 30887.

It is an arithmetic number, because the mean of its divisors is an integer number (8049780).

Almost surely, 2^64039398 is an apocalyptic number.

64039398 is an abundant number, since it is smaller than the sum of its proper divisors (64757082).

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

64039398 is a wasteful number, since it uses less digits than its factorization.

64039398 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 59811.

The product of its (nonzero) digits is 139968, while the sum is 42.

The square root of 64039398 is about 8002.4619961609. The cubic root of 64039398 is about 400.0820623300.

The spelling of 64039398 in words is "sixty-four million, thirty-nine thousand, three hundred ninety-eight".