83840990 has 16 divisors (see below), whose sum is σ = 151789248. Its totient is φ = 33341856.

The previous prime is 83840971. The next prime is 83840993. The reversal of 83840990 is 9904838.

It is a super-3 number, since 3×83840990³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (83840993) 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, 22502 + ... + 25961.

It is an arithmetic number, because the mean of its divisors is an integer number (9486828).

Almost surely, 2^83840990 is an apocalyptic number.

83840990 is a deficient number, since it is larger than the sum of its proper divisors (67948258).

83840990 is a wasteful number, since it uses less digits than its factorization.

83840990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48643.

The product of its (nonzero) digits is 62208, while the sum is 41.

The square root of 83840990 is about 9156.4725740866. The cubic root of 83840990 is about 437.6753952523.

The spelling of 83840990 in words is "eighty-three million, eight hundred forty thousand, nine hundred ninety".