79669278 has 32 divisors (see below), whose sum is σ = 190663200. Its totient is φ = 24513408.

The previous prime is 79669253. The next prime is 79669279. The reversal of 79669278 is 87296697.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79669279) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 56043 + ... + 57446.

It is an arithmetic number, because the mean of its divisors is an integer number (5958225).

Almost surely, 2^79669278 is an apocalyptic number.

79669278 is a gapful number since it is divisible by the number (78) formed by its first and last digit.

79669278 is an abundant number, since it is smaller than the sum of its proper divisors (110993922).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

79669278 is a wasteful number, since it uses less digits than its factorization.

79669278 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 113513 (or 113507 counting only the distinct ones).

The product of its digits is 2286144, while the sum is 54.

The square root of 79669278 is about 8925.7648411775. The cubic root of 79669278 is about 430.2923521165.

The spelling of 79669278 in words is "seventy-nine million, six hundred sixty-nine thousand, two hundred seventy-eight".