189183890 has 32 divisors (see below), whose sum is σ = 389781504. Its totient is φ = 64762560.

The previous prime is 189183889. The next prime is 189183941. The reversal of 189183890 is 98381981.

It is a happy 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, 54095 + ... + 57485.

It is an arithmetic number, because the mean of its divisors is an integer number (12180672).

Almost surely, 2^189183890 is an apocalyptic number.

189183890 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189183890 is an abundant number, since it is smaller than the sum of its proper divisors (200597614).

189183890 is a wasteful number, since it uses less digits than its factorization.

189183890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4202.

The product of its (nonzero) digits is 124416, while the sum is 47.

The square root of 189183890 is about 13754.4134735001. The cubic root of 189183890 is about 574.0654156205.

The spelling of 189183890 in words is "one hundred eighty-nine million, one hundred eighty-three thousand, eight hundred ninety".