857402206992 has 120 divisors (see below), whose sum is σ = 2491160826336. Its totient is φ = 285484455936.

The previous prime is 857402206981. The next prime is 857402207071. The reversal of 857402206992 is 299602204758.

857402206992 is a `hidden beast` number, since 8 + 574 + 0 + 2 + 2 + 0 + 69 + 9 + 2 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3404848 + ... + 3647984.

Almost surely, 2^857402206992 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 857402206992, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1245580413168).

857402206992 is an abundant number, since it is smaller than the sum of its proper divisors (1633758619344).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

857402206992 is a wasteful number, since it uses less digits than its factorization.

857402206992 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244067 (or 244049 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 857402206992 in words is "eight hundred fifty-seven billion, four hundred two million, two hundred six thousand, nine hundred ninety-two".