860220990 has 24 divisors (see below), whose sum is σ = 2236574808. Its totient is φ = 229392240.

The previous prime is 860220979. The next prime is 860221009. The reversal of 860220990 is 99022068.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 4778916 + ... + 4779095.

It is an arithmetic number, because the mean of its divisors is an integer number (93190617).

Almost surely, 2^860220990 is an apocalyptic number.

860220990 is an abundant number, since it is smaller than the sum of its proper divisors (1376353818).

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

860220990 is a wasteful number, since it uses less digits than its factorization.

860220990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9558024 (or 9558021 counting only the distinct ones).

The product of its (nonzero) digits is 15552, while the sum is 36.

The square root of 860220990 is about 29329.5242034371. The cubic root of 860220990 is about 951.0499895770.

It can be divided in two parts, 8602 and 20990, that added together give a palindrome (29592).

The spelling of 860220990 in words is "eight hundred sixty million, two hundred twenty thousand, nine hundred ninety".