64831880 has 64 divisors (see below), whose sum is σ = 156867840. Its totient is φ = 24026112.

The previous prime is 64831859. The next prime is 64831883. The reversal of 64831880 is 8813846.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (64831883) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 44849 + ... + 46271.

It is an arithmetic number, because the mean of its divisors is an integer number (2451060).

Almost surely, 2^64831880 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64831880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (78433920).

64831880 is an abundant number, since it is smaller than the sum of its proper divisors (92035960).

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

64831880 is a wasteful number, since it uses less digits than its factorization.

64831880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1518 (or 1514 counting only the distinct ones).

The product of its (nonzero) digits is 36864, while the sum is 38.

The square root of 64831880 is about 8051.8246379315. The cubic root of 64831880 is about 401.7256281467.

The spelling of 64831880 in words is "sixty-four million, eight hundred thirty-one thousand, eight hundred eighty".