728920732 has 24 divisors (see below), whose sum is σ = 1318338560. Its totient is φ = 352280880.

The previous prime is 728920727. The next prime is 728920741. The reversal of 728920732 is 237029827.

It is a congruent number.

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, 116869 + ... + 122947.

Almost surely, 2^728920732 is an apocalyptic number.

It is an amenable number.

728920732 is a deficient number, since it is larger than the sum of its proper divisors (589417828).

728920732 is a wasteful number, since it uses less digits than its factorization.

728920732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7081 (or 7079 counting only the distinct ones).

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 728920732 is about 26998.5320341681. The cubic root of 728920732 is about 899.9673782415.

The spelling of 728920732 in words is "seven hundred twenty-eight million, nine hundred twenty thousand, seven hundred thirty-two".