857457406 has 16 divisors (see below), whose sum is σ = 1390284000. Its totient is φ = 394275168.

The previous prime is 857457401. The next prime is 857457431. The reversal of 857457406 is 604754758.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (857457401) 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, 54306 + ... + 68293.

It is an arithmetic number, because the mean of its divisors is an integer number (86892750).

Almost surely, 2^857457406 is an apocalyptic number.

857457406 is a deficient number, since it is larger than the sum of its proper divisors (532826594).

857457406 is a wasteful number, since it uses less digits than its factorization.

857457406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122883.

The product of its (nonzero) digits is 940800, while the sum is 46.

The square root of 857457406 is about 29282.3736401269. The cubic root of 857457406 is about 950.0304352207.

The spelling of 857457406 in words is "eight hundred fifty-seven million, four hundred fifty-seven thousand, four hundred six".