79821324 has 144 divisors (see below), whose sum is σ = 237758976. Its totient is φ = 22310400.

The previous prime is 79821323. The next prime is 79821331. The reversal of 79821324 is 42312897.

It is a super-2 number, since 2×79821324² = 12742887530225952, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (79821323) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 477889 + ... + 478055.

It is an arithmetic number, because the mean of its divisors is an integer number (1651104).

Almost surely, 2^79821324 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 79821324, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (118879488).

79821324 is an abundant number, since it is smaller than the sum of its proper divisors (157937652).

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

79821324 is a wasteful number, since it uses less digits than its factorization.

79821324 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 276 (or 271 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 79821324 is about 8934.2780346260. The cubic root of 79821324 is about 430.5659107443.

It can be divided in two parts, 798 and 21324, that added together give a palindrome (22122).

The spelling of 79821324 in words is "seventy-nine million, eight hundred twenty-one thousand, three hundred twenty-four".