728413731 has 12 divisors (see below), whose sum is σ = 1052620920. Its totient is φ = 485393280.

The previous prime is 728413723. The next prime is 728413759. The reversal of 728413731 is 137314827.

728413731 is a `hidden beast` number, since 7 + 284 + 1 + 373 + 1 = 666.

It is not a de Polignac number, because 728413731 - 2³ = 728413723 is a prime.

It is a super-2 number, since 2×728413731² = 1061173127018680722, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (728413711) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4915 + ... + 38483.

It is an arithmetic number, because the mean of its divisors is an integer number (87718410).

Almost surely, 2^728413731 is an apocalyptic number.

728413731 is a deficient number, since it is larger than the sum of its proper divisors (324207189).

728413731 is a wasteful number, since it uses less digits than its factorization.

728413731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35986 (or 35983 counting only the distinct ones).

The product of its digits is 28224, while the sum is 36.

The square root of 728413731 is about 26989.1409829954. The cubic root of 728413731 is about 899.7586723328.

The spelling of 728413731 in words is "seven hundred twenty-eight million, four hundred thirteen thousand, seven hundred thirty-one".