189442380 has 24 divisors (see below), whose sum is σ = 530438832. Its totient is φ = 50517952.

The previous prime is 189442361. The next prime is 189442397. The reversal of 189442380 is 83244981.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1578627 + ... + 1578746.

It is an arithmetic number, because the mean of its divisors is an integer number (22101618).

Almost surely, 2^189442380 is an apocalyptic number.

189442380 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

189442380 is an abundant number, since it is smaller than the sum of its proper divisors (340996452).

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

189442380 is a wasteful number, since it uses less digits than its factorization.

189442380 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3157385 (or 3157383 counting only the distinct ones).

The product of its (nonzero) digits is 55296, while the sum is 39.

The square root of 189442380 is about 13763.8068861780. The cubic root of 189442380 is about 574.3267533003.

The spelling of 189442380 in words is "one hundred eighty-nine million, four hundred forty-two thousand, three hundred eighty".