64856406 has 8 divisors (see below), whose sum is σ = 129712824. Its totient is φ = 21618800.

The previous prime is 64856387. The next prime is 64856413. The reversal of 64856406 is 60465846.

It is a sphenic number, since it is the product of 3 distinct primes.

64856406 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5404695 + ... + 5404706.

It is an arithmetic number, because the mean of its divisors is an integer number (16214103).

Almost surely, 2^64856406 is an apocalyptic number.

64856406 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

64856406 is a wasteful number, since it uses less digits than its factorization.

64856406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10809406.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 64856406 is about 8053.3475027469. The cubic root of 64856406 is about 401.7762795679.

The spelling of 64856406 in words is "sixty-four million, eight hundred fifty-six thousand, four hundred six".