649443352 has 8 divisors (see below), whose sum is σ = 1217706300. Its totient is φ = 324721672.

The previous prime is 649443337. The next prime is 649443391. The reversal of 649443352 is 253344946.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40590202 + ... + 40590217.

Almost surely, 2^649443352 is an apocalyptic number.

It is an amenable number.

649443352 is a deficient number, since it is larger than the sum of its proper divisors (568262948).

649443352 is a wasteful number, since it uses less digits than its factorization.

649443352 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 81180425 (or 81180421 counting only the distinct ones).

The product of its digits is 311040, while the sum is 40.

The square root of 649443352 is about 25484.1784642943. The cubic root of 649443352 is about 865.9917576602.

The spelling of 649443352 in words is "six hundred forty-nine million, four hundred forty-three thousand, three hundred fifty-two".