40005636 has 24 divisors (see below), whose sum is σ = 101832864. Its totient is φ = 12122880.

The previous prime is 40005611. The next prime is 40005643. The reversal of 40005636 is 63650004.

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, 151405 + ... + 151668.

It is an arithmetic number, because the mean of its divisors is an integer number (4243036).

Almost surely, 2^40005636 is an apocalyptic number.

It is an amenable number.

40005636 is an abundant number, since it is smaller than the sum of its proper divisors (61827228).

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

40005636 is a wasteful number, since it uses less digits than its factorization.

40005636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303091 (or 303089 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 24.

The square root of 40005636 is about 6325.0008695652. Note that the first 3 decimals coincide. The cubic root of 40005636 is about 342.0112509551.

The spelling of 40005636 in words is "forty million, five thousand, six hundred thirty-six".