82179690 has 32 divisors (see below), whose sum is σ = 205808256. Its totient is φ = 20961600.

The previous prime is 82179689. The next prime is 82179763. The reversal of 82179690 is 9697128.

It is a super-2 number, since 2×82179690² = 13507002896992200, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58861 + ... + 60240.

It is an arithmetic number, because the mean of its divisors is an integer number (6431508).

Almost surely, 2^82179690 is an apocalyptic number.

82179690 is an abundant number, since it is smaller than the sum of its proper divisors (123628566).

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

82179690 is a wasteful number, since it uses less digits than its factorization.

82179690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 119134.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 82179690 is about 9065.3014290756. The cubic root of 82179690 is about 434.7652584714.

The spelling of 82179690 in words is "eighty-two million, one hundred seventy-nine thousand, six hundred ninety".