63856380 has 48 divisors (see below), whose sum is σ = 204341760. Its totient is φ = 14595648.

The previous prime is 63856379. The next prime is 63856399. The reversal of 63856380 is 8365836.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 75600 + ... + 76439.

It is an arithmetic number, because the mean of its divisors is an integer number (4257120).

Almost surely, 2^63856380 is an apocalyptic number.

63856380 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

63856380 is an abundant number, since it is smaller than the sum of its proper divisors (140485380).

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

63856380 is a wasteful number, since it uses less digits than its factorization.

63856380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152058 (or 152056 counting only the distinct ones).

The product of its (nonzero) digits is 103680, while the sum is 39.

The square root of 63856380 is about 7991.0187085252. The cubic root of 63856380 is about 399.7005675732.

The spelling of 63856380 in words is "sixty-three million, eight hundred fifty-six thousand, three hundred eighty".