728756975 has 6 divisors (see below), whose sum is σ = 903658680. Its totient is φ = 583005560.

The previous prime is 728756971. The next prime is 728756983. The reversal of 728756975 is 579657827.

It is not a de Polignac number, because 728756975 - 2² = 728756971 is a prime.

It is a super-2 number, since 2×728756975² = 1062173457222301250, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 728756975.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728756971) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14575115 + ... + 14575164.

It is an arithmetic number, because the mean of its divisors is an integer number (150609780).

Almost surely, 2^728756975 is an apocalyptic number.

728756975 is a deficient number, since it is larger than the sum of its proper divisors (174901705).

728756975 is a wasteful number, since it uses less digits than its factorization.

728756975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29150289 (or 29150284 counting only the distinct ones).

The product of its digits is 7408800, while the sum is 56.

The square root of 728756975 is about 26995.4991618973. The cubic root of 728756975 is about 899.8999785965.

The spelling of 728756975 in words is "seven hundred twenty-eight million, seven hundred fifty-six thousand, nine hundred seventy-five".