185680940 has 12 divisors (see below), whose sum is σ = 389930016. Its totient is φ = 74272368.

The previous prime is 185680933. The next prime is 185680949. The reversal of 185680940 is 49086581.

It is a super-2 number, since 2×185680940² = 68954822958567200, which contains 22 as substring.

It is a hoax number, since the sum of its digits (41) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (185680949) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4642004 + ... + 4642043.

It is an arithmetic number, because the mean of its divisors is an integer number (32494168).

Almost surely, 2^185680940 is an apocalyptic number.

185680940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

185680940 is an abundant number, since it is smaller than the sum of its proper divisors (204249076).

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

185680940 is a wasteful number, since it uses less digits than its factorization.

185680940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9284056 (or 9284054 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 41.

The square root of 185680940 is about 13626.4793692281. The cubic root of 185680940 is about 570.5001662978.

The spelling of 185680940 in words is "one hundred eighty-five million, six hundred eighty thousand, nine hundred forty".