40013632 has 14 divisors (see below), whose sum is σ = 79402178. Its totient is φ = 20006784.

The previous prime is 40013627. The next prime is 40013647. The reversal of 40013632 is 23631004.

It can be written as a sum of positive squares in only one way, i.e., 39137536 + 876096 = 6256^2 + 936^2 .

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, 312543 + ... + 312670.

Almost surely, 2^40013632 is an apocalyptic number.

It is an amenable number.

40013632 is a deficient number, since it is larger than the sum of its proper divisors (39388546).

40013632 is an equidigital number, since it uses as much as digits as its factorization.

40013632 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 625225 (or 625215 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 19.

The square root of 40013632 is about 6325.6329327586. The cubic root of 40013632 is about 342.0340355762.

Adding to 40013632 its reverse (23631004), we get a palindrome (63644636).

The spelling of 40013632 in words is "forty million, thirteen thousand, six hundred thirty-two".