40105636 has 6 divisors (see below), whose sum is σ = 70184870. Its totient is φ = 20052816.

The previous prime is 40105631. The next prime is 40105643. The reversal of 40105636 is 63650104.

It can be written as a sum of positive squares in only one way, i.e., 37283236 + 2822400 = 6106^2 + 1680^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40105636.

It is not an unprimeable number, because it can be changed into a prime (40105631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5013201 + ... + 5013208.

Almost surely, 2^40105636 is an apocalyptic number.

It is an amenable number.

40105636 is a deficient number, since it is larger than the sum of its proper divisors (30079234).

40105636 is a wasteful number, since it uses less digits than its factorization.

40105636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10026413 (or 10026411 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 40105636 is about 6332.9010729681. The cubic root of 40105636 is about 342.2959830670.

The spelling of 40105636 in words is "forty million, one hundred five thousand, six hundred thirty-six".