4001956 has 24 divisors (see below), whose sum is σ = 8176896. Its totient is φ = 1678080.

The previous prime is 4001947. The next prime is 4001999. The reversal of 4001956 is 6591004.

It is a self number, because there is not a number n which added to its sum of digits gives 4001956.

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, 205 + ... + 2836.

It is an arithmetic number, because the mean of its divisors is an integer number (340704).

Almost surely, 2^4001956 is an apocalyptic number.

It is an amenable number.

4001956 is an abundant number, since it is smaller than the sum of its proper divisors (4174940).

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

4001956 is a wasteful number, since it uses less digits than its factorization.

4001956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3099 (or 3097 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 25.

The square root of 4001956 is about 2000.4889402344. The cubic root of 4001956 is about 158.7659756175.

The spelling of 4001956 in words is "four million, one thousand, nine hundred fifty-six".