728798290538 has 16 divisors (see below), whose sum is σ = 1095083293920. Its totient is φ = 363770638416.

The previous prime is 728798290523. The next prime is 728798290553. The reversal of 728798290538 is 835092897827.

It is an interprime number because it is at equal distance from previous prime (728798290523) and next prime (728798290553).

It is a super-2 number, since 2×728798290538² (a number of 25 digits) contains 22 as substring.

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, 17657081 + ... + 17698307.

It is an arithmetic number, because the mean of its divisors is an integer number (68442705870).

Almost surely, 2^728798290538 is an apocalyptic number.

728798290538 is a deficient number, since it is larger than the sum of its proper divisors (366285003382).

728798290538 is a wasteful number, since it uses less digits than its factorization.

728798290538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56261.

The product of its (nonzero) digits is 121927680, while the sum is 68.

The spelling of 728798290538 in words is "seven hundred twenty-eight billion, seven hundred ninety-eight million, two hundred ninety thousand, five hundred thirty-eight".