79338690 has 80 divisors (see below), whose sum is σ = 218627640. Its totient is φ = 20632320.

The previous prime is 79338671. The next prime is 79338739. The reversal of 79338690 is 9683397.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 31438449 + 47900241 = 5607^2 + 6921^2 .

It is a super-2 number, since 2×79338690² = 12589255461832200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

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 in 39 ways as a sum of consecutive naturals, for example, 32016 + ... + 34404.

Almost surely, 2^79338690 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79338690, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (109313820).

79338690 is an abundant number, since it is smaller than the sum of its proper divisors (139288950).

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

79338690 is a wasteful number, since it uses less digits than its factorization.

79338690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2449 (or 2440 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 45.

The square root of 79338690 is about 8907.2268411667. The cubic root of 79338690 is about 429.6963603639.

The spelling of 79338690 in words is "seventy-nine million, three hundred thirty-eight thousand, six hundred ninety".