63387312 has 80 divisors (see below), whose sum is σ = 173322240. Its totient is φ = 19929600.

The previous prime is 63387307. The next prime is 63387391. The reversal of 63387312 is 21378336.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors.

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, 60489 + ... + 61527.

It is an arithmetic number, because the mean of its divisors is an integer number (2166528).

Almost surely, 2^63387312 is an apocalyptic number.

63387312 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 63387312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (86661120).

63387312 is an abundant number, since it is smaller than the sum of its proper divisors (109934928).

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

63387312 is a wasteful number, since it uses less digits than its factorization.

63387312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1122 (or 1116 counting only the distinct ones).

The product of its digits is 18144, while the sum is 33.

The square root of 63387312 is about 7961.6149115616. The cubic root of 63387312 is about 398.7194716591.

The spelling of 63387312 in words is "sixty-three million, three hundred eighty-seven thousand, three hundred twelve".