79428731 has 8 divisors (see below), whose sum is σ = 81285120. Its totient is φ = 77579368.

The previous prime is 79428703. The next prime is 79428749. The reversal of 79428731 is 13782497.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 79428731 - 2¹⁰ = 79427707 is a prime.

It is a super-2 number, since 2×79428731² = 12617846616540722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (79428781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 26150 + ... + 29028.

It is an arithmetic number, because the mean of its divisors is an integer number (10160640).

Almost surely, 2^79428731 is an apocalyptic number.

79428731 is a deficient number, since it is larger than the sum of its proper divisors (1856389).

79428731 is a wasteful number, since it uses less digits than its factorization.

79428731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3513.

The product of its digits is 84672, while the sum is 41.

The square root of 79428731 is about 8912.2797869008. The cubic root of 79428731 is about 429.8588521769.

The spelling of 79428731 in words is "seventy-nine million, four hundred twenty-eight thousand, seven hundred thirty-one".