79881822 has 32 divisors (see below), whose sum is σ = 180172800. Its totient is φ = 26228664.

The previous prime is 79881821. The next prime is 79881839. The reversal of 79881822 is 22818897.

It is a happy number.

It is a super-2 number, since 2×79881822² = 12762210972079368, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (79881821) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7422 + ... + 14657.

It is an arithmetic number, because the mean of its divisors is an integer number (5630400).

Almost surely, 2^79881822 is an apocalyptic number.

79881822 is an abundant number, since it is smaller than the sum of its proper divisors (100290978).

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

79881822 is a wasteful number, since it uses less digits than its factorization.

79881822 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22157 (or 22151 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 79881822 is about 8937.6631173926. The cubic root of 79881822 is about 430.6746611261.

The spelling of 79881822 in words is "seventy-nine million, eight hundred eighty-one thousand, eight hundred twenty-two".