857044690 has 16 divisors (see below), whose sum is σ = 1584375192. Its totient is φ = 333552384.

The previous prime is 857044673. The next prime is 857044697. The reversal of 857044690 is 96440758.

It can be written as a sum of positive squares in 4 ways, for example, as 760160041 + 96884649 = 27571^2 + 9843^2 .

It is a super-2 number, since 2×857044690² = 1469051201314392200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (857044697) 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, 1157799 + ... + 1158538.

Almost surely, 2^857044690 is an apocalyptic number.

857044690 is a deficient number, since it is larger than the sum of its proper divisors (727330502).

857044690 is a wasteful number, since it uses less digits than its factorization.

857044690 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2316381.

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 857044690 is about 29275.3256173181. The cubic root of 857044690 is about 949.8779861765.

The spelling of 857044690 in words is "eight hundred fifty-seven million, forty-four thousand, six hundred ninety".