79491428 has 6 divisors (see below), whose sum is σ = 139110006. Its totient is φ = 39745712.

The previous prime is 79491397. The next prime is 79491443. The reversal of 79491428 is 82419497.

It can be written as a sum of positive squares in only one way, i.e., 51380224 + 28111204 = 7168^2 + 5302^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9936425 + ... + 9936432.

It is an arithmetic number, because the mean of its divisors is an integer number (23185001).

Almost surely, 2^79491428 is an apocalyptic number.

It is an amenable number.

79491428 is a deficient number, since it is larger than the sum of its proper divisors (59618578).

79491428 is a wasteful number, since it uses less digits than its factorization.

79491428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19872861 (or 19872859 counting only the distinct ones).

The product of its digits is 145152, while the sum is 44.

The square root of 79491428 is about 8915.7965432147. The cubic root of 79491428 is about 429.9719253349.

The spelling of 79491428 in words is "seventy-nine million, four hundred ninety-one thousand, four hundred twenty-eight".