189088390 has 16 divisors (see below), whose sum is σ = 341889408. Its totient is φ = 75295296.

The previous prime is 189088387. The next prime is 189088409. The reversal of 189088390 is 93880981.

It is a self number, because there is not a number n which added to its sum of digits gives 189088390.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40167 + ... + 44626.

It is an arithmetic number, because the mean of its divisors is an integer number (21368088).

Almost surely, 2^189088390 is an apocalyptic number.

189088390 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189088390 is a deficient number, since it is larger than the sum of its proper divisors (152801018).

189088390 is a wasteful number, since it uses less digits than its factorization.

189088390 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85023.

The product of its (nonzero) digits is 124416, while the sum is 46.

The square root of 189088390 is about 13750.9414223172. The cubic root of 189088390 is about 573.9688033161.

The spelling of 189088390 in words is "one hundred eighty-nine million, eighty-eight thousand, three hundred ninety".