40213636 has 12 divisors (see below), whose sum is σ = 74513628. Its totient is φ = 18924032.

The previous prime is 40213627. The next prime is 40213639. The reversal of 40213636 is 63631204.

It can be written as a sum of positive squares in 2 ways, for example, as 37748736 + 2464900 = 6144^2 + 1570^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 40213636.

It is not an unprimeable number, because it can be changed into a prime (40213639) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 295621 + ... + 295756.

It is an arithmetic number, because the mean of its divisors is an integer number (6209469).

Almost surely, 2^40213636 is an apocalyptic number.

It is an amenable number.

40213636 is a deficient number, since it is larger than the sum of its proper divisors (34299992).

40213636 is a wasteful number, since it uses less digits than its factorization.

40213636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 591398 (or 591396 counting only the distinct ones).

The product of its (nonzero) digits is 2592, while the sum is 25.

The square root of 40213636 is about 6341.4222379526. The cubic root of 40213636 is about 342.6029626329.

The spelling of 40213636 in words is "forty million, two hundred thirteen thousand, six hundred thirty-six".