857456379 has 24 divisors (see below), whose sum is σ = 1339687440. Its totient is φ = 525344832.

The previous prime is 857456371. The next prime is 857456393. The reversal of 857456379 is 973654758.

857456379 is a `hidden beast` number, since 8 + 5 + 7 + 4 + 563 + 79 = 666.

It is not a de Polignac number, because 857456379 - 2³ = 857456371 is a prime.

It is not an unprimeable number, because it can be changed into a prime (857456371) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 10792 + ... + 42794.

It is an arithmetic number, because the mean of its divisors is an integer number (55820310).

Almost surely, 2^857456379 is an apocalyptic number.

857456379 is a deficient number, since it is larger than the sum of its proper divisors (482231061).

857456379 is a wasteful number, since it uses less digits than its factorization.

857456379 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32251 (or 32248 counting only the distinct ones).

The product of its digits is 6350400, while the sum is 54.

The square root of 857456379 is about 29282.3561039750. The cubic root of 857456379 is about 950.0300559281.

The spelling of 857456379 in words is "eight hundred fifty-seven million, four hundred fifty-six thousand, three hundred seventy-nine".