63979728 has 40 divisors (see below), whose sum is σ = 167998176. Its totient is φ = 20976000.

The previous prime is 63979717. The next prime is 63979739. The reversal of 63979728 is 82797936.

It is an interprime number because it is at equal distance from previous prime (63979717) and next prime (63979739).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7998 + ... + 13853.

Almost surely, 2^63979728 is an apocalyptic number.

It is an amenable number.

63979728 is an abundant number, since it is smaller than the sum of its proper divisors (104018448).

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

63979728 is a wasteful number, since it uses less digits than its factorization.

63979728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21923 (or 21917 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 51.

The square root of 63979728 is about 7998.7328996535. The cubic root of 63979728 is about 399.9577622067.

The spelling of 63979728 in words is "sixty-three million, nine hundred seventy-nine thousand, seven hundred twenty-eight".