189764894 has 16 divisors (see below), whose sum is σ = 326868480. Its totient is φ = 81716760.

The previous prime is 189764867. The next prime is 189764899. The reversal of 189764894 is 498467981.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189764899) 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, 226574 + ... + 227409.

It is an arithmetic number, because the mean of its divisors is an integer number (20429280).

Almost surely, 2^189764894 is an apocalyptic number.

189764894 is a deficient number, since it is larger than the sum of its proper divisors (137103586).

189764894 is a wasteful number, since it uses less digits than its factorization.

189764894 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 454015.

The product of its digits is 3483648, while the sum is 56.

The square root of 189764894 is about 13775.5179212979. The cubic root of 189764894 is about 574.6524871804.

The spelling of 189764894 in words is "one hundred eighty-nine million, seven hundred sixty-four thousand, eight hundred ninety-four".