647674460 has 12 divisors (see below), whose sum is σ = 1360116408. Its totient is φ = 259069776.

The previous prime is 647674453. The next prime is 647674477. The reversal of 647674460 is 64476746.

It is a super-2 number, since 2×647674460² = 838964412272583200, which contains 22 as substring.

It is a congruent number.

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, 16191842 + ... + 16191881.

It is an arithmetic number, because the mean of its divisors is an integer number (113343034).

Almost surely, 2^647674460 is an apocalyptic number.

It is an amenable number.

647674460 is an abundant number, since it is smaller than the sum of its proper divisors (712441948).

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

647674460 is a wasteful number, since it uses less digits than its factorization.

647674460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32383732 (or 32383730 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 44.

The square root of 647674460 is about 25449.4491099513. The cubic root of 647674460 is about 865.2048074404.

The spelling of 647674460 in words is "six hundred forty-seven million, six hundred seventy-four thousand, four hundred sixty".