188821494 has 24 divisors (see below), whose sum is σ = 423221760. Its totient is φ = 60769968.

The previous prime is 188821433. The next prime is 188821511. The reversal of 188821494 is 494128881.

188821494 is a `hidden beast` number, since 1 + 88 + 82 + 1 + 494 = 666.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 180342 + ... + 181385.

It is an arithmetic number, because the mean of its divisors is an integer number (17634240).

Almost surely, 2^188821494 is an apocalyptic number.

188821494 is an abundant number, since it is smaller than the sum of its proper divisors (234400266).

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

188821494 is a wasteful number, since it uses less digits than its factorization.

188821494 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 361764 (or 361761 counting only the distinct ones).

The product of its digits is 147456, while the sum is 45.

The square root of 188821494 is about 13741.2333507586. The cubic root of 188821494 is about 573.6986261262.

The spelling of 188821494 in words is "one hundred eighty-eight million, eight hundred twenty-one thousand, four hundred ninety-four".