185945990 has 16 divisors (see below), whose sum is σ = 337148352. Its totient is φ = 73834944.

The previous prime is 185945987. The next prime is 185946001. The reversal of 185945990 is 99549581.

185945990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×185945990² = 69151822394160200, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66494 + ... + 69233.

It is an arithmetic number, because the mean of its divisors is an integer number (21071772).

Almost surely, 2^185945990 is an apocalyptic number.

185945990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

185945990 is a deficient number, since it is larger than the sum of its proper divisors (151202362).

185945990 is a wasteful number, since it uses less digits than its factorization.

185945990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 135871.

The product of its (nonzero) digits is 583200, while the sum is 50.

The square root of 185945990 is about 13636.2014505507. The cubic root of 185945990 is about 570.7714904617.

The spelling of 185945990 in words is "one hundred eighty-five million, nine hundred forty-five thousand, nine hundred ninety".