869143992 has 16 divisors (see below), whose sum is σ = 2172860040. Its totient is φ = 289714656.

The previous prime is 869143981. The next prime is 869144021. The reversal of 869143992 is 299341968.

It is a super-2 number, since 2×869143992² = 1510822557659392128, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18107143 + ... + 18107190.

Almost surely, 2^869143992 is an apocalyptic number.

It is an amenable number.

869143992 is an abundant number, since it is smaller than the sum of its proper divisors (1303716048).

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

869143992 is a wasteful number, since it uses less digits than its factorization.

869143992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36214342 (or 36214338 counting only the distinct ones).

The product of its digits is 839808, while the sum is 51.

The square root of 869143992 is about 29481.2481418274. The cubic root of 869143992 is about 954.3270725191.

The spelling of 869143992 in words is "eight hundred sixty-nine million, one hundred forty-three thousand, nine hundred ninety-two".