857311945 has 8 divisors (see below), whose sum is σ = 1175742144. Its totient is φ = 587871024.

The previous prime is 857311943. The next prime is 857311957. The reversal of 857311945 is 549113758.

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

It is a cyclic number.

It is not a de Polignac number, because 857311945 - 2¹ = 857311943 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (857311943) 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, 12247279 + ... + 12247348.

It is an arithmetic number, because the mean of its divisors is an integer number (146967768).

Almost surely, 2^857311945 is an apocalyptic number.

It is an amenable number.

857311945 is a deficient number, since it is larger than the sum of its proper divisors (318430199).

857311945 is a wasteful number, since it uses less digits than its factorization.

857311945 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24494639.

The product of its digits is 151200, while the sum is 43.

The square root of 857311945 is about 29279.8897709674. The cubic root of 857311945 is about 949.9767104170.

The spelling of 857311945 in words is "eight hundred fifty-seven million, three hundred eleven thousand, nine hundred forty-five".