731649628 has 12 divisors (see below), whose sum is σ = 1280960352. Its totient is φ = 365660960.

The previous prime is 731649617. The next prime is 731649637. The reversal of 731649628 is 826946137.

731649628 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×731649628² = 1070622356305076768, 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, 30628 + ... + 49003.

It is an arithmetic number, because the mean of its divisors is an integer number (106746696).

Almost surely, 2^731649628 is an apocalyptic number.

It is an amenable number.

731649628 is a deficient number, since it is larger than the sum of its proper divisors (549310724).

731649628 is a wasteful number, since it uses less digits than its factorization.

731649628 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81932 (or 81930 counting only the distinct ones).

The product of its digits is 435456, while the sum is 46.

The square root of 731649628 is about 27049.0226810508. The cubic root of 731649628 is about 901.0890635177.

The spelling of 731649628 in words is "seven hundred thirty-one million, six hundred forty-nine thousand, six hundred twenty-eight".