190289857 has 8 divisors (see below), whose sum is σ = 201717000. Its totient is φ = 178888704.

The previous prime is 190289797. The next prime is 190289861. The reversal of 190289857 is 758982091.

It can be written as a sum of positive squares in 4 ways, for example, as 18181696 + 172108161 = 4264^2 + 13119^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-190289857 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 190289857.

It is not an unprimeable number, because it can be changed into a prime (190289657) 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, 9769 + ... + 21817.

It is an arithmetic number, because the mean of its divisors is an integer number (25214625).

Almost surely, 2^190289857 is an apocalyptic number.

190289857 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

190289857 is a deficient number, since it is larger than the sum of its proper divisors (11427143).

190289857 is a wasteful number, since it uses less digits than its factorization.

190289857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12995.

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

The square root of 190289857 is about 13794.5589635914. The cubic root of 190289857 is about 575.1819028769.

The spelling of 190289857 in words is "one hundred ninety million, two hundred eighty-nine thousand, eight hundred fifty-seven".