40002056 has 8 divisors (see below), whose sum is σ = 75003870. Its totient is φ = 20001024.

The previous prime is 40002043. The next prime is 40002073. The reversal of 40002056 is 65020004.

It can be written as a sum of positive squares in only one way, i.e., 37332100 + 2669956 = 6110^2 + 1634^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2500121 + ... + 2500136.

Almost surely, 2^40002056 is an apocalyptic number.

It is an amenable number.

40002056 is a deficient number, since it is larger than the sum of its proper divisors (35001814).

40002056 is a wasteful number, since it uses less digits than its factorization.

40002056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5000263 (or 5000259 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 17.

The square root of 40002056 is about 6324.7178593199. The cubic root of 40002056 is about 342.0010487525.

The spelling of 40002056 in words is "forty million, two thousand, fifty-six", and thus it is an eban number.