189220990 has 32 divisors (see below), whose sum is σ = 389833920. Its totient is φ = 64779264.

The previous prime is 189220979. The next prime is 189221003. The reversal of 189220990 is 99022981.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 58126 + ... + 61294.

It is an arithmetic number, because the mean of its divisors is an integer number (12182310).

Almost surely, 2^189220990 is an apocalyptic number.

189220990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189220990 is an abundant number, since it is smaller than the sum of its proper divisors (200612930).

189220990 is a wasteful number, since it uses less digits than its factorization.

189220990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4036.

The product of its (nonzero) digits is 23328, while the sum is 40.

The square root of 189220990 is about 13755.7620654037. The cubic root of 189220990 is about 574.1029389615.

The spelling of 189220990 in words is "one hundred eighty-nine million, two hundred twenty thousand, nine hundred ninety".