79919228 has 6 divisors (see below), whose sum is σ = 139858656. Its totient is φ = 39959612.

The previous prime is 79919221. The next prime is 79919237. The reversal of 79919228 is 82291997.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79919221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9989900 + ... + 9989907.

It is an arithmetic number, because the mean of its divisors is an integer number (23309776).

Almost surely, 2^79919228 is an apocalyptic number.

It is an amenable number.

79919228 is a deficient number, since it is larger than the sum of its proper divisors (59939428).

79919228 is a wasteful number, since it uses less digits than its factorization.

79919228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19979811 (or 19979809 counting only the distinct ones).

The product of its digits is 163296, while the sum is 47.

The square root of 79919228 is about 8939.7554776403. The cubic root of 79919228 is about 430.7418741752.

The spelling of 79919228 in words is "seventy-nine million, nine hundred nineteen thousand, two hundred twenty-eight".