63664828 has 12 divisors (see below), whose sum is σ = 116257680. Its totient is φ = 30448352.

The previous prime is 63664817. The next prime is 63664879. The reversal of 63664828 is 82846636.

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, 345913 + ... + 346096.

It is an arithmetic number, because the mean of its divisors is an integer number (9688140).

Almost surely, 2^63664828 is an apocalyptic number.

It is an amenable number.

63664828 is a deficient number, since it is larger than the sum of its proper divisors (52592852).

63664828 is a wasteful number, since it uses less digits than its factorization.

63664828 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 692036 (or 692034 counting only the distinct ones).

The product of its digits is 331776, while the sum is 43.

The square root of 63664828 is about 7979.0242511224. The cubic root of 63664828 is about 399.3005024711.

The spelling of 63664828 in words is "sixty-three million, six hundred sixty-four thousand, eight hundred twenty-eight".