79788458 has 4 divisors (see below), whose sum is σ = 119682690. Its totient is φ = 39894228.

The previous prime is 79788439. The next prime is 79788461. The reversal of 79788458 is 85488797.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 58323769 + 21464689 = 7637^2 + 4633^2 .

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19947113 + ... + 19947116.

Almost surely, 2^79788458 is an apocalyptic number.

79788458 is a deficient number, since it is larger than the sum of its proper divisors (39894232).

79788458 is a wasteful number, since it uses less digits than its factorization.

79788458 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39894231.

The product of its digits is 4515840, while the sum is 56.

The square root of 79788458 is about 8932.4385248374. The cubic root of 79788458 is about 430.5068082340.

The spelling of 79788458 in words is "seventy-nine million, seven hundred eighty-eight thousand, four hundred fifty-eight".