851992090 has 16 divisors (see below), whose sum is σ = 1552999680. Its totient is φ = 336482640.

The previous prime is 851992051. The next prime is 851992109. The reversal of 851992090 is 90299158.

851992090 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

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, 538446 + ... + 540025.

It is an arithmetic number, because the mean of its divisors is an integer number (97062480).

Almost surely, 2^851992090 is an apocalyptic number.

851992090 is a deficient number, since it is larger than the sum of its proper divisors (701007590).

851992090 is a wasteful number, since it uses less digits than its factorization.

851992090 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078557.

The product of its (nonzero) digits is 58320, while the sum is 43.

The square root of 851992090 is about 29188.9035422710. The cubic root of 851992090 is about 948.0076769186.

The spelling of 851992090 in words is "eight hundred fifty-one million, nine hundred ninety-two thousand, ninety".