860979900 has 144 divisors (see below), whose sum is σ = 2738574720. Its totient is φ = 207110400.

The previous prime is 860979893. The next prime is 860979919. The reversal of 860979900 is 9979068.

It is a happy number.

It is a hoax number, since the sum of its digits (48) coincides with the sum of the digits of its distinct prime factors.

It is a self number, because there is not a number n which added to its sum of digits gives 860979900.

It is a congruent number.

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, 457762 + ... + 459638.

It is an arithmetic number, because the mean of its divisors is an integer number (19017880).

Almost surely, 2^860979900 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 860979900, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1369287360).

860979900 is an abundant number, since it is smaller than the sum of its proper divisors (1877594820).

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

860979900 is a wasteful number, since it uses less digits than its factorization.

860979900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2044 (or 2037 counting only the distinct ones).

The product of its (nonzero) digits is 244944, while the sum is 48.

The square root of 860979900 is about 29342.4589971597. The cubic root of 860979900 is about 951.3295879622.

The spelling of 860979900 in words is "eight hundred sixty million, nine hundred seventy-nine thousand, nine hundred".