860220920 has 32 divisors (see below), whose sum is σ = 2084382720. Its totient is φ = 317619840.

The previous prime is 860220919. The next prime is 860220923. The reversal of 860220920 is 29022068.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (860220923) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 826616 + ... + 827655.

It is an arithmetic number, because the mean of its divisors is an integer number (65136960).

Almost surely, 2^860220920 is an apocalyptic number.

It is an amenable number.

860220920 is an abundant number, since it is smaller than the sum of its proper divisors (1224161800).

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

860220920 is a wasteful number, since it uses less digits than its factorization.

860220920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1654295 (or 1654291 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 860220920 is about 29329.5230101002. The cubic root of 860220920 is about 951.0499637800.

Adding to 860220920 its reverse (29022068), we get a palindrome (889242988).

The spelling of 860220920 in words is "eight hundred sixty million, two hundred twenty thousand, nine hundred twenty".