79998072 has 128 divisors (see below), whose sum is σ = 253186560. Its totient is φ = 20459520.

The previous prime is 79998053. The next prime is 79998077. The reversal of 79998072 is 27089997.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79998077) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 134608 + ... + 135200.

It is an arithmetic number, because the mean of its divisors is an integer number (1978020).

Almost surely, 2^79998072 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 79998072, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (126593280).

79998072 is an abundant number, since it is smaller than the sum of its proper divisors (173188488).

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

79998072 is a wasteful number, since it uses less digits than its factorization.

79998072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 689 counting only the distinct ones).

The product of its (nonzero) digits is 571536, while the sum is 51.

The square root of 79998072 is about 8944.1641308733. The cubic root of 79998072 is about 430.8834765202.

The spelling of 79998072 in words is "seventy-nine million, nine hundred ninety-eight thousand, seventy-two".