79821104 has 40 divisors (see below), whose sum is σ = 169328448. Its totient is φ = 36150080.

The previous prime is 79821101. The next prime is 79821113. The reversal of 79821104 is 40112897.

It is not an unprimeable number, because it can be changed into a prime (79821101) 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, 60419 + ... + 61725.

Almost surely, 2^79821104 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 79821104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84664224).

79821104 is an abundant number, since it is smaller than the sum of its proper divisors (89507344).

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

79821104 is a wasteful number, since it uses less digits than its factorization.

79821104 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1673 (or 1667 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 32.

The square root of 79821104 is about 8934.2657224867. The cubic root of 79821104 is about 430.5655151750.

The spelling of 79821104 in words is "seventy-nine million, eight hundred twenty-one thousand, one hundred four".