6840857142 has 48 divisors (see below), whose sum is σ = 16944175872. Its totient is φ = 1953964080.

The previous prime is 6840857123. The next prime is 6840857173. The reversal of 6840857142 is 2417580486.

6840857142 is a modest number, since divided by 857142 gives 6840 as remainder.

It is a congruent number.

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, 638167 + ... + 648797.

It is an arithmetic number, because the mean of its divisors is an integer number (353003664).

Almost surely, 2^6840857142 is an apocalyptic number.

6840857142 is an abundant number, since it is smaller than the sum of its proper divisors (10103318730).

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

6840857142 is a wasteful number, since it uses less digits than its factorization.

6840857142 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15753 (or 15750 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 6840857142 is about 82709.4743182424. The cubic root of 6840857142 is about 1898.3232799437.

The spelling of 6840857142 in words is "six billion, eight hundred forty million, eight hundred fifty-seven thousand, one hundred forty-two".