63472644 has 72 divisors (see below), whose sum is σ = 165957792. Its totient is φ = 20442240.

The previous prime is 63472637. The next prime is 63472657. The reversal of 63472644 is 44627436.

63472644 is a `hidden beast` number, since 6 + 3 + 4 + 7 + 2 + 644 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 63472599 and 63472608.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 202632 + ... + 202944.

Almost surely, 2^63472644 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63472644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (82978896).

63472644 is an abundant number, since it is smaller than the sum of its proper divisors (102485148).

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

63472644 is a wasteful number, since it uses less digits than its factorization.

63472644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497 (or 492 counting only the distinct ones).

The product of its digits is 96768, while the sum is 36.

The square root of 63472644 is about 7966.9720722493. The cubic root of 63472644 is about 398.8983101511.

The spelling of 63472644 in words is "sixty-three million, four hundred seventy-two thousand, six hundred forty-four".