1680626892 has 36 divisors (see below), whose sum is σ = 4561703160. Its totient is φ = 480178944.

The previous prime is 1680626869. The next prime is 1680626917. The reversal of 1680626892 is 2986260861.

It is a happy number.

It is a super-2 number, since 2×1680626892² = 5649013500227159328, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1428517 + ... + 1429692.

Almost surely, 2^1680626892 is an apocalyptic number.

1680626892 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1680626892 is an abundant number, since it is smaller than the sum of its proper divisors (2881076268).

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

1680626892 is a wasteful number, since it uses less digits than its factorization.

1680626892 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2858230 (or 2858221 counting only the distinct ones).

The product of its (nonzero) digits is 497664, while the sum is 48.

The square root of 1680626892 is about 40995.4496499307. The cubic root of 1680626892 is about 1188.9322371296.

The spelling of 1680626892 in words is "one billion, six hundred eighty million, six hundred twenty-six thousand, eight hundred ninety-two".