1856998672 has 20 divisors (see below), whose sum is σ = 3809578716. Its totient is φ = 873881600.

The previous prime is 1856998643. The next prime is 1856998709. The reversal of 1856998672 is 2768996581.

It can be written as a sum of positive squares in 2 ways, for example, as 1355417856 + 501580816 = 36816^2 + 22396^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1856998672.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3413329 + ... + 3413872.

Almost surely, 2^1856998672 is an apocalyptic number.

It is an amenable number.

1856998672 is an abundant number, since it is smaller than the sum of its proper divisors (1952580044).

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

1856998672 is a wasteful number, since it uses less digits than its factorization.

1856998672 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6827226 (or 6827220 counting only the distinct ones).

The product of its digits is 13063680, while the sum is 61.

The square root of 1856998672 is about 43092.9074442651. The cubic root of 1856998672 is about 1229.1471100615.

The spelling of 1856998672 in words is "one billion, eight hundred fifty-six million, nine hundred ninety-eight thousand, six hundred seventy-two".