79815944 has 32 divisors (see below), whose sum is σ = 162462720. Its totient is φ = 36542016.

The previous prime is 79815943. The next prime is 79815977. The reversal of 79815944 is 44951897.

It is a super-2 number, since 2×79815944² = 12741169833222272, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (79815943) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10187 + ... + 16229.

It is an arithmetic number, because the mean of its divisors is an integer number (5076960).

Almost surely, 2^79815944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 79815944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81231360).

79815944 is an abundant number, since it is smaller than the sum of its proper divisors (82646776).

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

79815944 is a wasteful number, since it uses less digits than its factorization.

79815944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6189 (or 6185 counting only the distinct ones).

The product of its digits is 362880, while the sum is 47.

The square root of 79815944 is about 8933.9769419895. The cubic root of 79815944 is about 430.5562370693.

The spelling of 79815944 in words is "seventy-nine million, eight hundred fifteen thousand, nine hundred forty-four".