860657980 has 96 divisors (see below), whose sum is σ = 2355405696. Its totient is φ = 256352256.

The previous prime is 860657977. The next prime is 860657981. The reversal of 860657980 is 89756068.

860657980 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860657981) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 17032 + ... + 44848.

It is an arithmetic number, because the mean of its divisors is an integer number (24535476).

Almost surely, 2^860657980 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 860657980, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1177702848).

860657980 is an abundant number, since it is smaller than the sum of its proper divisors (1494747716).

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

860657980 is a wasteful number, since it uses less digits than its factorization.

860657980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27863 (or 27861 counting only the distinct ones).

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 860657980 is about 29336.9729181455. The cubic root of 860657980 is about 951.2110059458.

The spelling of 860657980 in words is "eight hundred sixty million, six hundred fifty-seven thousand, nine hundred eighty".