79152778 has 12 divisors (see below), whose sum is σ = 119394198. Its totient is φ = 39355760.

The previous prime is 79152763. The next prime is 79152779. The reversal of 79152778 is 87725197.

It can be written as a sum of positive squares in 3 ways, for example, as 78801129 + 351649 = 8877^2 + 593^2 .

It is not an unprimeable number, because it can be changed into a prime (79152779) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 171468 + ... + 171928.

Almost surely, 2^79152778 is an apocalyptic number.

79152778 is a deficient number, since it is larger than the sum of its proper divisors (40241420).

79152778 is an equidigital number, since it uses as much as digits as its factorization.

79152778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1049 (or 756 counting only the distinct ones).

The product of its digits is 246960, while the sum is 46.

The square root of 79152778 is about 8896.7847001037. The cubic root of 79152778 is about 429.3604662831.

The spelling of 79152778 in words is "seventy-nine million, one hundred fifty-two thousand, seven hundred seventy-eight".