860491800 has 288 divisors, whose sum is σ = 3410734080. Its totient is φ = 190252800.

The previous prime is 860491777. The next prime is 860491867. The reversal of 860491800 is 8194068.

It is a happy number.

It is a super-2 number, since 2×860491800² = 1480892275734480000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 389499 + ... + 391701.

Almost surely, 2^860491800 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 860491800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1705367040).

860491800 is an abundant number, since it is smaller than the sum of its proper divisors (2550242280).

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

860491800 is a wasteful number, since it uses less digits than its factorization.

860491800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2263 (or 2251 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 36.

The square root of 860491800 is about 29334.1405191971. The cubic root of 860491800 is about 951.1497805331.

The spelling of 860491800 in words is "eight hundred sixty million, four hundred ninety-one thousand, eight hundred".