40013504 has 28 divisors (see below), whose sum is σ = 82143600. Its totient is φ = 19315968.

The previous prime is 40013483. The next prime is 40013507. The reversal of 40013504 is 40531004.

It is not an unprimeable number, because it can be changed into a prime (40013507) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8924 + ... + 12635.

It is an arithmetic number, because the mean of its divisors is an integer number (2933700).

Almost surely, 2^40013504 is an apocalyptic number.

It is an amenable number.

40013504 is an abundant number, since it is smaller than the sum of its proper divisors (42130096).

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

40013504 is a wasteful number, since it uses less digits than its factorization.

40013504 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21600 (or 21590 counting only the distinct ones).

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

The square root of 40013504 is about 6325.6228151859. The cubic root of 40013504 is about 342.0336708638.

Adding to 40013504 its reverse (40531004), we get a palindrome (80544508).

The spelling of 40013504 in words is "forty million, thirteen thousand, five hundred four".