857872994 has 16 divisors (see below), whose sum is σ = 1405041120. Its totient is φ = 389595360.

The previous prime is 857872987. The next prime is 857873059. The reversal of 857872994 is 499278758.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8822 + ... + 42350.

It is an arithmetic number, because the mean of its divisors is an integer number (87815070).

Almost surely, 2^857872994 is an apocalyptic number.

857872994 is a deficient number, since it is larger than the sum of its proper divisors (547168126).

857872994 is a wasteful number, since it uses less digits than its factorization.

857872994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34705.

The product of its digits is 10160640, while the sum is 59.

The square root of 857872994 is about 29289.4689948452. The cubic root of 857872994 is about 950.1838957021.

The spelling of 857872994 in words is "eight hundred fifty-seven million, eight hundred seventy-two thousand, nine hundred ninety-four".