728132656 has 40 divisors (see below), whose sum is σ = 1448907264. Its totient is φ = 354332160.

The previous prime is 728132641. The next prime is 728132659. The reversal of 728132656 is 656231827.

It is a super-2 number, since 2×728132656² = 1060354329467228672, which contains 22 as substring.

It is a hoax number, since the sum of its digits (40) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (728132659) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104316 + ... + 111076.

Almost surely, 2^728132656 is an apocalyptic number.

It is an amenable number.

728132656 is a deficient number, since it is larger than the sum of its proper divisors (720774608).

728132656 is a wasteful number, since it uses less digits than its factorization.

728132656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6949 (or 6943 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The square root of 728132656 is about 26983.9332937213. The cubic root of 728132656 is about 899.6429266633.

The spelling of 728132656 in words is "seven hundred twenty-eight million, one hundred thirty-two thousand, six hundred fifty-six".