64625390 has 16 divisors (see below), whose sum is σ = 120078720. Its totient is φ = 25016160.

The previous prime is 64625383. The next prime is 64625399. The reversal of 64625390 is 9352646.

It is a self number, because there is not a number n which added to its sum of digits gives 64625390.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64625399) 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, 103925 + ... + 104544.

It is an arithmetic number, because the mean of its divisors is an integer number (7504920).

Almost surely, 2^64625390 is an apocalyptic number.

64625390 is a deficient number, since it is larger than the sum of its proper divisors (55453330).

64625390 is a wasteful number, since it uses less digits than its factorization.

64625390 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 208507.

The product of its (nonzero) digits is 38880, while the sum is 35.

The square root of 64625390 is about 8038.9918522163. The cubic root of 64625390 is about 401.2986748791.

The spelling of 64625390 in words is "sixty-four million, six hundred twenty-five thousand, three hundred ninety".