83490990 has 32 divisors (see below), whose sum is σ = 218595456. Its totient is φ = 20240160.

The previous prime is 83490983. The next prime is 83491003. The reversal of 83490990 is 9909438.

It is a super-2 number, since 2×83490990² = 13941490822360200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 126172 + ... + 126831.

It is an arithmetic number, because the mean of its divisors is an integer number (6831108).

Almost surely, 2^83490990 is an apocalyptic number.

83490990 is an abundant number, since it is smaller than the sum of its proper divisors (135104466).

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

83490990 is a wasteful number, since it uses less digits than its factorization.

83490990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 253024.

The product of its (nonzero) digits is 69984, while the sum is 42.

The square root of 83490990 is about 9137.3404226832. The cubic root of 83490990 is about 437.0655104117.

The spelling of 83490990 in words is "eighty-three million, four hundred ninety thousand, nine hundred ninety".