6840057 has 48 divisors (see below), whose sum is σ = 11673600. Its totient is φ = 3538080.

The previous prime is 6840049. The next prime is 6840061. The reversal of 6840057 is 7500486.

It is a happy number.

It is not a de Polignac number, because 6840057 - 2³ = 6840049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (6840017) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 86544 + ... + 86622.

It is an arithmetic number, because the mean of its divisors is an integer number (243200).

Almost surely, 2^6840057 is an apocalyptic number.

It is an amenable number.

6840057 is a deficient number, since it is larger than the sum of its proper divisors (4833543).

6840057 is a wasteful number, since it uses less digits than its factorization.

6840057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 146 (or 139 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 30.

The square root of 6840057 is about 2615.3502633491. The cubic root of 6840057 is about 189.8249264491.

The spelling of 6840057 in words is "six million, eight hundred forty thousand, fifty-seven".