83906990 has 32 divisors (see below), whose sum is σ = 158132736. Its totient is φ = 31995040.

The previous prime is 83906989. The next prime is 83907007. The reversal of 83906990 is 9960938.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112559 + ... + 113301.

It is an arithmetic number, because the mean of its divisors is an integer number (4941648).

Almost surely, 2^83906990 is an apocalyptic number.

83906990 is a deficient number, since it is larger than the sum of its proper divisors (74225746).

83906990 is a wasteful number, since it uses less digits than its factorization.

83906990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1264.

The product of its (nonzero) digits is 104976, while the sum is 44.

The square root of 83906990 is about 9160.0758730482. The cubic root of 83906990 is about 437.7902118017.

The spelling of 83906990 in words is "eighty-three million, nine hundred six thousand, nine hundred ninety".