82181190 has 64 divisors (see below), whose sum is σ = 242758656. Its totient is φ = 17338752.

The previous prime is 82181189. The next prime is 82181207. The reversal of 82181190 is 9118128.

It is a super-2 number, since 2×82181190² = 13507495979632200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12322 + ... + 17781.

It is an arithmetic number, because the mean of its divisors is an integer number (3793104).

Almost surely, 2^82181190 is an apocalyptic number.

82181190 is an abundant number, since it is smaller than the sum of its proper divisors (160577466).

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

82181190 is a wasteful number, since it uses less digits than its factorization.

82181190 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30133.

The product of its (nonzero) digits is 1152, while the sum is 30.

The square root of 82181190 is about 9065.3841617441. The cubic root of 82181190 is about 434.7679036664.

The spelling of 82181190 in words is "eighty-two million, one hundred eighty-one thousand, one hundred ninety".