4007856 has 20 divisors (see below), whose sum is σ = 10353752. Its totient is φ = 1335936.

The previous prime is 4007851. The next prime is 4007863. The reversal of 4007856 is 6587004.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (4007851) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41701 + ... + 41796.

Almost surely, 2^4007856 is an apocalyptic number.

It is an amenable number.

4007856 is an abundant number, since it is smaller than the sum of its proper divisors (6345896).

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

4007856 is a wasteful number, since it uses less digits than its factorization.

4007856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 83508 (or 83502 counting only the distinct ones).

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

The square root of 4007856 is about 2001.9630366218. The cubic root of 4007856 is about 158.8439590923.

It can be divided in two parts, 400 and 7856, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 4007856 in words is "four million, seven thousand, eight hundred fifty-six".