190889257 has 16 divisors (see below), whose sum is σ = 217546560. Its totient is φ = 166041792.

The previous prime is 190889203. The next prime is 190889261. The reversal of 190889257 is 752988091.

190889257 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 190889257 - 2⁷ = 190889129 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 190889257.

It is not an unprimeable number, because it can be changed into a prime (190889267) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 46698 + ... + 50620.

It is an arithmetic number, because the mean of its divisors is an integer number (13596660).

Almost surely, 2^190889257 is an apocalyptic number.

It is an amenable number.

190889257 is a deficient number, since it is larger than the sum of its proper divisors (26657303).

190889257 is a wasteful number, since it uses less digits than its factorization.

190889257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4152.

The product of its (nonzero) digits is 362880, while the sum is 49.

The square root of 190889257 is about 13816.2678390367. The cubic root of 190889257 is about 575.7851977237.

The spelling of 190889257 in words is "one hundred ninety million, eight hundred eighty-nine thousand, two hundred fifty-seven".