857008542 has 32 divisors (see below), whose sum is σ = 1846978560. Its totient is φ = 263535840.

The previous prime is 857008519. The next prime is 857008561. The reversal of 857008542 is 245800758.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a self number, because there is not a number n which added to its sum of digits gives 857008542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 253459 + ... + 256817.

It is an arithmetic number, because the mean of its divisors is an integer number (57718080).

Almost surely, 2^857008542 is an apocalyptic number.

857008542 is an abundant number, since it is smaller than the sum of its proper divisors (989970018).

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

857008542 is a wasteful number, since it uses less digits than its factorization.

857008542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6648.

The product of its (nonzero) digits is 89600, while the sum is 39.

The square root of 857008542 is about 29274.7082308261. The cubic root of 857008542 is about 949.8646314967.

The spelling of 857008542 in words is "eight hundred fifty-seven million, eight thousand, five hundred forty-two".