64278870 has 32 divisors (see below), whose sum is σ = 163345248. Its totient is φ = 16132608.

The previous prime is 64278793. The next prime is 64278871. The reversal of 64278870 is 7887246.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64278871) 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, 62509 + ... + 63528.

It is an arithmetic number, because the mean of its divisors is an integer number (5104539).

Almost surely, 2^64278870 is an apocalyptic number.

64278870 is an abundant number, since it is smaller than the sum of its proper divisors (99066378).

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

64278870 is a wasteful number, since it uses less digits than its factorization.

64278870 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126064.

The product of its (nonzero) digits is 150528, while the sum is 42.

The square root of 64278870 is about 8017.4104298084. The cubic root of 64278870 is about 400.5801373615.

The spelling of 64278870 in words is "sixty-four million, two hundred seventy-eight thousand, eight hundred seventy".