79128742 has 32 divisors (see below), whose sum is σ = 150209280. Its totient is φ = 30365280.

The previous prime is 79128737. The next prime is 79128767. The reversal of 79128742 is 24782197.

It is a super-2 number, since 2×79128742² = 12522715621005128, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 79128695 and 79128704.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6484 + ... + 14152.

It is an arithmetic number, because the mean of its divisors is an integer number (4694040).

Almost surely, 2^79128742 is an apocalyptic number.

79128742 is a deficient number, since it is larger than the sum of its proper divisors (71080538).

79128742 is a wasteful number, since it uses less digits than its factorization.

79128742 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7756.

The product of its digits is 56448, while the sum is 40.

The square root of 79128742 is about 8895.4337724475. The cubic root of 79128742 is about 429.3170011716.

It can be divided in two parts, 79 and 128742, that added together give a palindrome (128821).

The spelling of 79128742 in words is "seventy-nine million, one hundred twenty-eight thousand, seven hundred forty-two".