185297138 has 16 divisors (see below), whose sum is σ = 304235736. Its totient is φ = 84119040.

The previous prime is 185297117. The next prime is 185297159. The reversal of 185297138 is 831792581.

185297138 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (185297117) and next prime (185297159).

It can be written as a sum of positive squares in 4 ways, for example, as 31214569 + 154082569 = 5587^2 + 12413^2 .

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, 56831 + ... + 60002.

Almost surely, 2^185297138 is an apocalyptic number.

185297138 is a deficient number, since it is larger than the sum of its proper divisors (118938598).

185297138 is a wasteful number, since it uses less digits than its factorization.

185297138 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116909.

The product of its digits is 120960, while the sum is 44.

The square root of 185297138 is about 13612.3891363713. The cubic root of 185297138 is about 570.1068210592.

The spelling of 185297138 in words is "one hundred eighty-five million, two hundred ninety-seven thousand, one hundred thirty-eight".