63471920 has 20 divisors (see below), whose sum is σ = 147572400. Its totient is φ = 25388736.

The previous prime is 63471917. The next prime is 63471953. The reversal of 63471920 is 2917436.

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-3 number, since 3×63471920³ (a number of 24 digits) contains 333 as substring.

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, 396620 + ... + 396779.

It is an arithmetic number, because the mean of its divisors is an integer number (7378620).

Almost surely, 2^63471920 is an apocalyptic number.

It is an amenable number.

63471920 is an abundant number, since it is smaller than the sum of its proper divisors (84100480).

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

63471920 is a wasteful number, since it uses less digits than its factorization.

63471920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 793412 (or 793406 counting only the distinct ones).

The product of its (nonzero) digits is 9072, while the sum is 32.

The square root of 63471920 is about 7966.9266345310. The cubic root of 63471920 is about 398.8967934689.

The spelling of 63471920 in words is "sixty-three million, four hundred seventy-one thousand, nine hundred twenty".