64839788 has 12 divisors (see below), whose sum is σ = 122198160. Its totient is φ = 29926032.

The previous prime is 64839787. The next prime is 64839809. The reversal of 64839788 is 88793846.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (64839787) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 623408 + ... + 623511.

It is an arithmetic number, because the mean of its divisors is an integer number (10183180).

Almost surely, 2^64839788 is an apocalyptic number.

It is an amenable number.

64839788 is a deficient number, since it is larger than the sum of its proper divisors (57358372).

64839788 is a wasteful number, since it uses less digits than its factorization.

64839788 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1246936 (or 1246934 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 53.

The square root of 64839788 is about 8052.3156917746. The cubic root of 64839788 is about 401.7419612487.

The spelling of 64839788 in words is "sixty-four million, eight hundred thirty-nine thousand, seven hundred eighty-eight".