189864790 has 16 divisors (see below), whose sum is σ = 342461520. Its totient is φ = 75789280.

The previous prime is 189864743. The next prime is 189864799. The reversal of 189864790 is 97468981.

It is a happy number.

189864790 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189864799) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14425 + ... + 24244.

It is an arithmetic number, because the mean of its divisors is an integer number (21403845).

Almost surely, 2^189864790 is an apocalyptic number.

189864790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

189864790 is a deficient number, since it is larger than the sum of its proper divisors (152596730).

189864790 is a wasteful number, since it uses less digits than its factorization.

189864790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39167.

The product of its (nonzero) digits is 870912, while the sum is 52.

The square root of 189864790 is about 13779.1432970269. The cubic root of 189864790 is about 574.7533056431.

The spelling of 189864790 in words is "one hundred eighty-nine million, eight hundred sixty-four thousand, seven hundred ninety".