189146790 has 48 divisors (see below), whose sum is σ = 562038048. Its totient is φ = 43233408.

The previous prime is 189146773. The next prime is 189146801. The reversal of 189146790 is 97641981.

It is a happy number.

189146790 is a `hidden beast` number, since 18 + 91 + 467 + 90 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 149487 + ... + 150746.

It is an arithmetic number, because the mean of its divisors is an integer number (11709126).

Almost surely, 2^189146790 is an apocalyptic number.

189146790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189146790 is an abundant number, since it is smaller than the sum of its proper divisors (372891258).

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

189146790 is a wasteful number, since it uses less digits than its factorization.

189146790 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 300253 (or 300250 counting only the distinct ones).

The product of its (nonzero) digits is 108864, while the sum is 45.

The square root of 189146790 is about 13753.0647493568. The cubic root of 189146790 is about 574.0278873735.

The spelling of 189146790 in words is "one hundred eighty-nine million, one hundred forty-six thousand, seven hundred ninety".