189654590 has 32 divisors (see below), whose sum is σ = 353562624. Its totient is φ = 73170720.

The previous prime is 189654581. The next prime is 189654629. The reversal of 189654590 is 95456981.

It is a happy number.

It is a Smith number, since the sum of its digits (47) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 112937 + ... + 114603.

It is an arithmetic number, because the mean of its divisors is an integer number (11048832).

Almost surely, 2^189654590 is an apocalyptic number.

189654590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189654590 is a deficient number, since it is larger than the sum of its proper divisors (163908034).

189654590 is a wasteful number, since it uses less digits than its factorization.

189654590 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2072.

The product of its (nonzero) digits is 388800, while the sum is 47.

The square root of 189654590 is about 13771.5137149117. The cubic root of 189654590 is about 574.5411234958.

The spelling of 189654590 in words is "one hundred eighty-nine million, six hundred fifty-four thousand, five hundred ninety".