189371790 has 32 divisors (see below), whose sum is σ = 504992160. Its totient is φ = 50499072.

The previous prime is 189371771. The next prime is 189371807. The reversal of 189371790 is 97173981.

189371790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 350419 + ... + 350958.

It is an arithmetic number, because the mean of its divisors is an integer number (15781005).

Almost surely, 2^189371790 is an apocalyptic number.

189371790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189371790 is an abundant number, since it is smaller than the sum of its proper divisors (315620370).

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

189371790 is a wasteful number, since it uses less digits than its factorization.

189371790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 701393 (or 701387 counting only the distinct ones).

The product of its (nonzero) digits is 95256, while the sum is 45.

The square root of 189371790 is about 13761.2423131053. The cubic root of 189371790 is about 574.2554092464.

The spelling of 189371790 in words is "one hundred eighty-nine million, three hundred seventy-one thousand, seven hundred ninety".