728782975 has 6 divisors (see below), whose sum is σ = 903690920. Its totient is φ = 583026360.

The previous prime is 728782961. The next prime is 728782993. The reversal of 728782975 is 579287827.

It is a de Polignac number, because none of the positive numbers 2^k-728782975 is a prime.

It is a super-2 number, since 2×728782975² = 1062249249299701250, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 14575635 + ... + 14575684.

Almost surely, 2^728782975 is an apocalyptic number.

728782975 is a deficient number, since it is larger than the sum of its proper divisors (174907945).

728782975 is a wasteful number, since it uses less digits than its factorization.

728782975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29151329 (or 29151324 counting only the distinct ones).

The product of its digits is 3951360, while the sum is 55.

The square root of 728782975 is about 26995.9807193589. The cubic root of 728782975 is about 899.9106804363.

The spelling of 728782975 in words is "seven hundred twenty-eight million, seven hundred eighty-two thousand, nine hundred seventy-five".