648012924 has 108 divisors (see below), whose sum is σ = 1815709896. Its totient is φ = 194673024.

The previous prime is 648012901. The next prime is 648012941. The reversal of 648012924 is 429210846.

648012924 is a `hidden beast` number, since 648 + 0 + 1 + 2 + 9 + 2 + 4 = 666.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 260374 + ... + 262850.

Almost surely, 2^648012924 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 648012924, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (907854948).

648012924 is an abundant number, since it is smaller than the sum of its proper divisors (1167696972).

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

648012924 is a wasteful number, since it uses less digits than its factorization.

648012924 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2556 (or 2538 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 648012924 is about 25456.0979727844. The cubic root of 648012924 is about 865.3554951195.

The spelling of 648012924 in words is "six hundred forty-eight million, twelve thousand, nine hundred twenty-four".