649009072 has 20 divisors (see below), whose sum is σ = 1257863440. Its totient is φ = 324399168.

The previous prime is 649009069. The next prime is 649009099. The reversal of 649009072 is 270900946.

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, 74413 + ... + 82675.

It is an arithmetic number, because the mean of its divisors is an integer number (62893172).

Almost surely, 2^649009072 is an apocalyptic number.

It is an amenable number.

649009072 is a deficient number, since it is larger than the sum of its proper divisors (608854368).

649009072 is a wasteful number, since it uses less digits than its factorization.

649009072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13180 (or 13174 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 37.

The square root of 649009072 is about 25475.6564586666. The cubic root of 649009072 is about 865.7986862867.

The spelling of 649009072 in words is "six hundred forty-nine million, nine thousand, seventy-two".