79491228 has 12 divisors (see below), whose sum is σ = 185479560. Its totient is φ = 26497072.

The previous prime is 79491227. The next prime is 79491239. The reversal of 79491228 is 82219497.

It is a tau number, because it is divible by the number of its divisors (12).

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 79491228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79491221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3312123 + ... + 3312146.

It is an arithmetic number, because the mean of its divisors is an integer number (15456630).

Almost surely, 2^79491228 is an apocalyptic number.

It is an amenable number.

79491228 is an abundant number, since it is smaller than the sum of its proper divisors (105988332).

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

79491228 is a wasteful number, since it uses less digits than its factorization.

79491228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6624276 (or 6624274 counting only the distinct ones).

The product of its digits is 72576, while the sum is 42.

The square root of 79491228 is about 8915.7853271599. The cubic root of 79491228 is about 429.9715647322.

The spelling of 79491228 in words is "seventy-nine million, four hundred ninety-one thousand, two hundred twenty-eight".