3956840 has 32 divisors (see below), whose sum is σ = 9192960. Its totient is φ = 1531200.

The previous prime is 3956833. The next prime is 3956857. The reversal of 3956840 is 486593.

It is a self number, because there is not a number n which added to its sum of digits gives 3956840.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 356 + ... + 2835.

It is an arithmetic number, because the mean of its divisors is an integer number (287280).

Almost surely, 2^3956840 is an apocalyptic number.

It is an amenable number.

3956840 is an abundant number, since it is smaller than the sum of its proper divisors (5236120).

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

3956840 is a wasteful number, since it uses less digits than its factorization.

3956840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3233 (or 3229 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 35.

The square root of 3956840 is about 1989.1807358810. The cubic root of 3956840 is about 158.1671040894.

The spelling of 3956840 in words is "three million, nine hundred fifty-six thousand, eight hundred forty".