647634080 has 48 divisors (see below), whose sum is σ = 1545846120. Its totient is φ = 256376832.

The previous prime is 647634077. The next prime is 647634107. The reversal of 647634080 is 80436746.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 335475856 + 312158224 = 18316^2 + 17668^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5345 + ... + 36384.

Almost surely, 2^647634080 is an apocalyptic number.

It is an amenable number.

647634080 is an abundant number, since it is smaller than the sum of its proper divisors (898212040).

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

647634080 is a wasteful number, since it uses less digits than its factorization.

647634080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41841 (or 41833 counting only the distinct ones).

The product of its (nonzero) digits is 96768, while the sum is 38.

The square root of 647634080 is about 25448.6557601772. The cubic root of 647634080 is about 865.1868263412.

The spelling of 647634080 in words is "six hundred forty-seven million, six hundred thirty-four thousand, eighty".