1856374900 has 36 divisors (see below), whose sum is σ = 4031765388. Its totient is φ = 741917440.

The previous prime is 1856374859. The next prime is 1856374909. The reversal of 1856374900 is 94736581.

It can be written as a sum of positive squares in 6 ways, for example, as 73170916 + 1783203984 = 8554^2 + 42228^2 .

It is a super-2 number, since 2×1856374900² = 6892255538700020000, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1856374909) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 120432 + ... + 134968.

It is an arithmetic number, because the mean of its divisors is an integer number (111993483).

Almost surely, 2^1856374900 is an apocalyptic number.

1856374900 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1856374900 is an abundant number, since it is smaller than the sum of its proper divisors (2175390488).

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

1856374900 is a wasteful number, since it uses less digits than its factorization.

1856374900 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15828 (or 15821 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 43.

The square root of 1856374900 is about 43085.6693112687. The cubic root of 1856374900 is about 1229.0094697883.

The spelling of 1856374900 in words is "one billion, eight hundred fifty-six million, three hundred seventy-four thousand, nine hundred".