82865990 has 16 divisors (see below), whose sum is σ = 157933152. Its totient is φ = 31196544.

The previous prime is 82865989. The next prime is 82866001. The reversal of 82865990 is 9956828.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 243554 + ... + 243893.

It is an arithmetic number, because the mean of its divisors is an integer number (9870822).

Almost surely, 2^82865990 is an apocalyptic number.

82865990 is a deficient number, since it is larger than the sum of its proper divisors (75067162).

82865990 is a wasteful number, since it uses less digits than its factorization.

82865990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 487471.

The product of its (nonzero) digits is 311040, while the sum is 47.

The square root of 82865990 is about 9103.0758537980. The cubic root of 82865990 is about 435.9721771938.

The spelling of 82865990 in words is "eighty-two million, eight hundred sixty-five thousand, nine hundred ninety".