630778464 has 36 divisors (see below), whose sum is σ = 1793777076. Its totient is φ = 210259392.

The previous prime is 630778457. The next prime is 630778501. The reversal of 630778464 is 464877036.

630778464 is a `hidden beast` number, since 630 + 7 + 7 + 8 + 4 + 6 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1094814 + ... + 1095389.

It is an arithmetic number, because the mean of its divisors is an integer number (49827141).

Almost surely, 2^630778464 is an apocalyptic number.

It is an amenable number.

630778464 is an abundant number, since it is smaller than the sum of its proper divisors (1162998612).

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

630778464 is a wasteful number, since it uses less digits than its factorization.

630778464 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2190219 (or 2190208 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

The square root of 630778464 is about 25115.3033825992. The cubic root of 630778464 is about 857.6148368219.

The spelling of 630778464 in words is "six hundred thirty million, seven hundred seventy-eight thousand, four hundred sixty-four".