64239856 has 20 divisors (see below), whose sum is σ = 124594704. Its totient is φ = 32086400.

The previous prime is 64239839. The next prime is 64239883. The reversal of 64239856 is 65893246.

64239856 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

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, 22341 + ... + 25051.

Almost surely, 2^64239856 is an apocalyptic number.

It is an amenable number.

64239856 is a deficient number, since it is larger than the sum of its proper divisors (60354848).

64239856 is a wasteful number, since it uses less digits than its factorization.

64239856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200 (or 4194 counting only the distinct ones).

The product of its digits is 311040, while the sum is 43.

The square root of 64239856 is about 8014.9769806282. The cubic root of 64239856 is about 400.4990770463.

The spelling of 64239856 in words is "sixty-four million, two hundred thirty-nine thousand, eight hundred fifty-six".