190804857 has 16 divisors (see below), whose sum is σ = 263208960. Its totient is φ = 122864000.

The previous prime is 190804853. The next prime is 190804877. The reversal of 190804857 is 758408091.

It is a cyclic number.

It is not a de Polignac number, because 190804857 - 2² = 190804853 is a prime.

It is not an unprimeable number, because it can be changed into a prime (190804853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4744 + ... + 20102.

It is an arithmetic number, because the mean of its divisors is an integer number (16450560).

Almost surely, 2^190804857 is an apocalyptic number.

It is an amenable number.

190804857 is a deficient number, since it is larger than the sum of its proper divisors (72404103).

190804857 is a wasteful number, since it uses less digits than its factorization.

190804857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15504.

The product of its (nonzero) digits is 80640, while the sum is 42.

The square root of 190804857 is about 13813.2131309120. The cubic root of 190804857 is about 575.7003257665.

The spelling of 190804857 in words is "one hundred ninety million, eight hundred four thousand, eight hundred fifty-seven".