82781922 has 16 divisors (see below), whose sum is σ = 172762560. Its totient is φ = 26394192.

The previous prime is 82781893. The next prime is 82781929. The reversal of 82781922 is 22918728.

It is a super-2 number, since 2×82781922² = 13705693220028168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82781929) 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, 299797 + ... + 300072.

It is an arithmetic number, because the mean of its divisors is an integer number (10797660).

Almost surely, 2^82781922 is an apocalyptic number.

82781922 is an abundant number, since it is smaller than the sum of its proper divisors (89980638).

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

82781922 is a wasteful number, since it uses less digits than its factorization.

82781922 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 599897.

The product of its digits is 32256, while the sum is 39.

The square root of 82781922 is about 9098.4571219521. The cubic root of 82781922 is about 435.8246952562.

The spelling of 82781922 in words is "eighty-two million, seven hundred eighty-one thousand, nine hundred twenty-two".