63970856 has 16 divisors (see below), whose sum is σ = 123815040. Its totient is φ = 30953520.

The previous prime is 63970801. The next prime is 63970861. The reversal of 63970856 is 65807936.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 128726 + ... + 129221.

It is an arithmetic number, because the mean of its divisors is an integer number (7738440).

Almost surely, 2^63970856 is an apocalyptic number.

It is an amenable number.

63970856 is a deficient number, since it is larger than the sum of its proper divisors (59844184).

63970856 is a wasteful number, since it uses less digits than its factorization.

63970856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 257984 (or 257980 counting only the distinct ones).

The product of its (nonzero) digits is 272160, while the sum is 44.

The square root of 63970856 is about 7998.1782925864. The cubic root of 63970856 is about 399.9392741147.

The spelling of 63970856 in words is "sixty-three million, nine hundred seventy thousand, eight hundred fifty-six".