857943642 has 32 divisors (see below), whose sum is σ = 1768036032. Its totient is φ = 277340544.

The previous prime is 857943617. The next prime is 857943673. The reversal of 857943642 is 246349758.

857943642 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 857943591 and 857943600.

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, 63313 + ... + 75659.

It is an arithmetic number, because the mean of its divisors is an integer number (55251126).

Almost surely, 2^857943642 is an apocalyptic number.

857943642 is an abundant number, since it is smaller than the sum of its proper divisors (910092390).

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

857943642 is a wasteful number, since it uses less digits than its factorization.

857943642 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12702.

The product of its digits is 1451520, while the sum is 48.

The square root of 857943642 is about 29290.6750007575. The cubic root of 857943642 is about 950.2099783312.

The spelling of 857943642 in words is "eight hundred fifty-seven million, nine hundred forty-three thousand, six hundred forty-two".