728192831 has 4 divisors (see below), whose sum is σ = 745127592. Its totient is φ = 711258072.

The previous prime is 728192797. The next prime is 728192833. The reversal of 728192831 is 138291827.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138291827 = 43 ⋅3216089.

It is a cyclic number.

It is not a de Polignac number, because 728192831 - 2⁶ = 728192767 is a prime.

It is a super-2 number, since 2×728192831² = 1060529598239589122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (728192833) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8467316 + ... + 8467401.

It is an arithmetic number, because the mean of its divisors is an integer number (186281898).

Almost surely, 2^728192831 is an apocalyptic number.

728192831 is a deficient number, since it is larger than the sum of its proper divisors (16934761).

728192831 is a wasteful number, since it uses less digits than its factorization.

728192831 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16934760.

The product of its digits is 48384, while the sum is 41.

The square root of 728192831 is about 26985.0482860417. The cubic root of 728192831 is about 899.6677090165.

The spelling of 728192831 in words is "seven hundred twenty-eight million, one hundred ninety-two thousand, eight hundred thirty-one".