189455590 has 16 divisors (see below), whose sum is σ = 348276672. Its totient is φ = 74169664.

The previous prime is 189455573. The next prime is 189455603. The reversal of 189455590 is 95554981.

It is a self number, because there is not a number n which added to its sum of digits gives 189455590.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 201079 + ... + 202018.

It is an arithmetic number, because the mean of its divisors is an integer number (21767292).

Almost surely, 2^189455590 is an apocalyptic number.

189455590 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189455590 is a deficient number, since it is larger than the sum of its proper divisors (158821082).

189455590 is a wasteful number, since it uses less digits than its factorization.

189455590 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 403151.

The product of its (nonzero) digits is 324000, while the sum is 46.

The square root of 189455590 is about 13764.2867595818. The cubic root of 189455590 is about 574.3401024430.

The spelling of 189455590 in words is "one hundred eighty-nine million, four hundred fifty-five thousand, five hundred ninety".