649235712 has 72 divisors (see below), whose sum is σ = 1829592576. Its totient is φ = 203677696.

The previous prime is 649235693. The next prime is 649235723. The reversal of 649235712 is 217532946.

It is a super-2 number, since 2×649235712² = 843014019472293888, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11808 + ... + 37919.

It is an arithmetic number, because the mean of its divisors is an integer number (25411008).

Almost surely, 2^649235712 is an apocalyptic number.

It is an amenable number.

649235712 is an abundant number, since it is smaller than the sum of its proper divisors (1180356864).

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

649235712 is a wasteful number, since it uses less digits than its factorization.

649235712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49763 (or 49749 counting only the distinct ones).

The product of its digits is 90720, while the sum is 39.

The square root of 649235712 is about 25480.1042384053. The cubic root of 649235712 is about 865.8994562071.

The spelling of 649235712 in words is "six hundred forty-nine million, two hundred thirty-five thousand, seven hundred twelve".