79721024 has 56 divisors (see below), whose sum is σ = 171175680. Its totient is φ = 36694016.

The previous prime is 79721009. The next prime is 79721027. The reversal of 79721024 is 42012797.

It is a Harshad number since it is a multiple of its sum of digits (32).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79721027) 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, 50357 + ... + 51915.

Almost surely, 2^79721024 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 79721024, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (85587840).

79721024 is an abundant number, since it is smaller than the sum of its proper divisors (91454656).

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

79721024 is a wasteful number, since it uses less digits than its factorization.

79721024 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1635 (or 1625 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 79721024 is about 8928.6630578155. The cubic root of 79721024 is about 430.3854916960.

The spelling of 79721024 in words is "seventy-nine million, seven hundred twenty-one thousand, twenty-four".