82555690 has 24 divisors (see below), whose sum is σ = 172862532. Its totient is φ = 28304640.

The previous prime is 82555687. The next prime is 82555699. The reversal of 82555690 is 9655528.

It can be written as a sum of positive squares in 2 ways, for example, as 82428241 + 127449 = 9079^2 + 357^2 .

It is a super-2 number, since 2×82555690² = 13630883902752200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (82555699) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 83751 + ... + 84730.

Almost surely, 2^82555690 is an apocalyptic number.

82555690 is an abundant number, since it is smaller than the sum of its proper divisors (90306842).

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

82555690 is a wasteful number, since it uses less digits than its factorization.

82555690 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 168502 (or 168495 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 40.

The square root of 82555690 is about 9086.0161787221. The cubic root of 82555690 is about 435.4273160352.

The spelling of 82555690 in words is "eighty-two million, five hundred fifty-five thousand, six hundred ninety".