869996556 has 144 divisors (see below), whose sum is σ = 2735879328. Its totient is φ = 229017600.

The previous prime is 869996497. The next prime is 869996587. The reversal of 869996556 is 655699968.

It is a super-2 number, since 2×869996556² = 1513788014903722272, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 869996493 and 869996502.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 82546 + ... + 92486.

It is an arithmetic number, because the mean of its divisors is an integer number (18999162).

Almost surely, 2^869996556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869996556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1367939664).

869996556 is an abundant number, since it is smaller than the sum of its proper divisors (1865882772).

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

869996556 is a wasteful number, since it uses less digits than its factorization.

869996556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9992 (or 9987 counting only the distinct ones).

The product of its digits is 31492800, while the sum is 63.

The square root of 869996556 is about 29495.7040261798. The cubic root of 869996556 is about 954.6390112481.

The spelling of 869996556 in words is "eight hundred sixty-nine million, nine hundred ninety-six thousand, five hundred fifty-six".