79978838 has 8 divisors (see below), whose sum is σ = 121759032. Its totient is φ = 39392496.

The previous prime is 79978837. The next prime is 79978841. The reversal of 79978838 is 83887997.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×79978838² = 12793229055660488, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79978837) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 298295 + ... + 298562.

It is an arithmetic number, because the mean of its divisors is an integer number (15219879).

Almost surely, 2^79978838 is an apocalyptic number.

79978838 is a deficient number, since it is larger than the sum of its proper divisors (41780194).

79978838 is a wasteful number, since it uses less digits than its factorization.

79978838 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596926.

The product of its digits is 6096384, while the sum is 59.

The square root of 79978838 is about 8943.0888399926. The cubic root of 79978838 is about 430.8489412001.

The spelling of 79978838 in words is "seventy-nine million, nine hundred seventy-eight thousand, eight hundred thirty-eight".