40020056 has 8 divisors (see below), whose sum is σ = 75037620. Its totient is φ = 20010024.

The previous prime is 40020041. The next prime is 40020067. The reversal of 40020056 is 65002004.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2501246 + ... + 2501261.

Almost surely, 2^40020056 is an apocalyptic number.

It is an amenable number.

40020056 is a deficient number, since it is larger than the sum of its proper divisors (35017564).

40020056 is a wasteful number, since it uses less digits than its factorization.

40020056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5002513 (or 5002509 counting only the distinct ones).

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

The square root of 40020056 is about 6326.1406876547. The cubic root of 40020056 is about 342.0523385808.

The spelling of 40020056 in words is "forty million, twenty thousand, fifty-six".