82176220 has 24 divisors (see below), whose sum is σ = 197223264. Its totient is φ = 28174656.

The previous prime is 82176209. The next prime is 82176229. The reversal of 82176220 is 2267128.

It is a super-2 number, since 2×82176220² = 13505862266976800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (82176229) 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, 293347 + ... + 293626.

It is an arithmetic number, because the mean of its divisors is an integer number (8217636).

Almost surely, 2^82176220 is an apocalyptic number.

It is an amenable number.

82176220 is an abundant number, since it is smaller than the sum of its proper divisors (115047044).

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

82176220 is a wasteful number, since it uses less digits than its factorization.

82176220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586989 (or 586987 counting only the distinct ones).

The product of its (nonzero) digits is 2688, while the sum is 28.

The square root of 82176220 is about 9065.1100379422. The cubic root of 82176220 is about 434.7591391302.

The spelling of 82176220 in words is "eighty-two million, one hundred seventy-six thousand, two hundred twenty".