189417990 has 32 divisors (see below), whose sum is σ = 464279040. Its totient is φ = 49436384.

The previous prime is 189417959. The next prime is 189418001. The reversal of 189417990 is 99714981.

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 15 ways as a sum of consecutive naturals, for example, 65760 + ... + 68579.

It is an arithmetic number, because the mean of its divisors is an integer number (14508720).

Almost surely, 2^189417990 is an apocalyptic number.

189417990 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189417990 is an abundant number, since it is smaller than the sum of its proper divisors (274861050).

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

189417990 is a wasteful number, since it uses less digits than its factorization.

189417990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134396.

The product of its (nonzero) digits is 163296, while the sum is 48.

The square root of 189417990 is about 13762.9208382523. The cubic root of 189417990 is about 574.3021047665.

The spelling of 189417990 in words is "one hundred eighty-nine million, four hundred seventeen thousand, nine hundred ninety".