6446856 has 32 divisors (see below), whose sum is σ = 17357760. Its totient is φ = 1983552.

The previous prime is 6446851. The next prime is 6446863. The reversal of 6446856 is 6586446.

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

It is not an unprimeable number, because it can be changed into a prime (6446851) 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, 10020 + ... + 10643.

It is an arithmetic number, because the mean of its divisors is an integer number (542430).

Almost surely, 2^6446856 is an apocalyptic number.

It is an amenable number.

6446856 is an abundant number, since it is smaller than the sum of its proper divisors (10910904).

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

6446856 is a wasteful number, since it uses less digits than its factorization.

6446856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20685 (or 20681 counting only the distinct ones).

The product of its digits is 138240, while the sum is 39.

The square root of 6446856 is about 2539.0659699976. The cubic root of 6446856 is about 186.1155485060.

The spelling of 6446856 in words is "six million, four hundred forty-six thousand, eight hundred fifty-six".