79509428 has 6 divisors (see below), whose sum is σ = 139141506. Its totient is φ = 39754712.

The previous prime is 79509407. The next prime is 79509439. The reversal of 79509428 is 82490597.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 55026724 + 24482704 = 7418^2 + 4948^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9938675 + ... + 9938682.

It is an arithmetic number, because the mean of its divisors is an integer number (23190251).

Almost surely, 2^79509428 is an apocalyptic number.

It is an amenable number.

79509428 is a deficient number, since it is larger than the sum of its proper divisors (59632078).

79509428 is a wasteful number, since it uses less digits than its factorization.

79509428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19877361 (or 19877359 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The square root of 79509428 is about 8916.8059303766. The cubic root of 79509428 is about 430.0043770962.

The spelling of 79509428 in words is "seventy-nine million, five hundred nine thousand, four hundred twenty-eight".