64838660 has 12 divisors (see below), whose sum is σ = 136161228. Its totient is φ = 25935456.

The previous prime is 64838611. The next prime is 64838681. The reversal of 64838660 is 6683846.

64838660 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 12334144 + 52504516 = 3512^2 + 7246^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1620947 + ... + 1620986.

It is an arithmetic number, because the mean of its divisors is an integer number (11346769).

Almost surely, 2^64838660 is an apocalyptic number.

It is an amenable number.

64838660 is an abundant number, since it is smaller than the sum of its proper divisors (71322568).

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

64838660 is a wasteful number, since it uses less digits than its factorization.

64838660 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3241942 (or 3241940 counting only the distinct ones).

The product of its (nonzero) digits is 165888, while the sum is 41.

The square root of 64838660 is about 8052.2456495067. The cubic root of 64838660 is about 401.7396315703.

The spelling of 64838660 in words is "sixty-four million, eight hundred thirty-eight thousand, six hundred sixty".