79409628 has 18 divisors (see below), whose sum is σ = 200729984. Its totient is φ = 26469864.

The previous prime is 79409621. The next prime is 79409647. The reversal of 79409628 is 82690497.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79409621) 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, 1102876 + ... + 1102947.

Almost surely, 2^79409628 is an apocalyptic number.

It is an amenable number.

79409628 is an abundant number, since it is smaller than the sum of its proper divisors (121320356).

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

79409628 is a wasteful number, since it uses less digits than its factorization.

79409628 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2205833 (or 2205828 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 79409628 is about 8911.2079989191. The cubic root of 79409628 is about 429.8243883586.

The spelling of 79409628 in words is "seventy-nine million, four hundred nine thousand, six hundred twenty-eight".