990187692 has 48 divisors (see below), whose sum is σ = 2493308160. Its totient is φ = 304043328.

The previous prime is 990187691. The next prime is 990187727. The reversal of 990187692 is 296781099.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (990187691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 72159 + ... + 84777.

It is an arithmetic number, because the mean of its divisors is an integer number (51943920).

Almost surely, 2^990187692 is an apocalyptic number.

It is an amenable number.

990187692 is an abundant number, since it is smaller than the sum of its proper divisors (1503120468).

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

990187692 is a wasteful number, since it uses less digits than its factorization.

990187692 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13142 (or 13140 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 990187692 is about 31467.2479254224. The cubic root of 990187692 is about 996.7184740329.

The spelling of 990187692 in words is "nine hundred ninety million, one hundred eighty-seven thousand, six hundred ninety-two".