188540361 has 27 divisors (see below), whose sum is σ = 286129389. Its totient is φ = 119624472.

The previous prime is 188540347. The next prime is 188540381. The reversal of 188540361 is 163045881.

The square root of 188540361 is 13731.

It is a perfect power (a square), and thus also a powerful number.

188540361 is a `hidden beast` number, since 1 + 88 + 540 + 36 + 1 = 666.

It is not a de Polignac number, because 188540361 - 2¹⁵ = 188507593 is a prime.

It is not an unprimeable number, because it can be changed into a prime (188540321) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 947340 + ... + 947538.

Almost surely, 2^188540361 is an apocalyptic number.

188540361 is the 13731-st square number.

188540361 is the 6866-th centered octagonal number.

It is an amenable number.

188540361 is a deficient number, since it is larger than the sum of its proper divisors (97589028).

188540361 is an equidigital number, since it uses as much as digits as its factorization.

188540361 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 450 (or 225 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 36.

The cubic root of 188540361 is about 573.4137614394.

Multiplying 188540361 by its sum of digits (36), we get a square (6787452996 = 82386²).

The spelling of 188540361 in words is "one hundred eighty-eight million, five hundred forty thousand, three hundred sixty-one".