40040604 has 18 divisors (see below), whose sum is σ = 101213840. Its totient is φ = 13346856.

The previous prime is 40040603. The next prime is 40040629. The reversal of 40040604 is 40604004.

40040604 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 556084 + ... + 556155.

Almost surely, 2^40040604 is an apocalyptic number.

It is an amenable number.

40040604 is an abundant number, since it is smaller than the sum of its proper divisors (61173236).

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

40040604 is a wasteful number, since it uses less digits than its factorization.

40040604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1112249 (or 1112244 counting only the distinct ones).

The product of its (nonzero) digits is 384, while the sum is 18.

The square root of 40040604 is about 6327.7645341779. The cubic root of 40040604 is about 342.1108699739.

Adding to 40040604 its reverse (40604004), we get a palindrome (80644608).

The spelling of 40040604 in words is "forty million, forty thousand, six hundred four".