40013320 has 16 divisors (see below), whose sum is σ = 90030060. Its totient is φ = 16005312.

The previous prime is 40013299. The next prime is 40013327. The reversal of 40013320 is 2331004.

It can be written as a sum of positive squares in 2 ways, for example, as 39715204 + 298116 = 6302^2 + 546^2 .

40013320 is a modest number, since divided by 13320 gives 40 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 40013320.

It is not an unprimeable number, because it can be changed into a prime (40013327) 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, 500127 + ... + 500206.

Almost surely, 2^40013320 is an apocalyptic number.

40013320 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40013320 is an abundant number, since it is smaller than the sum of its proper divisors (50016740).

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

40013320 is a wasteful number, since it uses less digits than its factorization.

40013320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1000344 (or 1000340 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 13.

The square root of 40013320 is about 6325.6082711467. The cubic root of 40013320 is about 342.0331465884.

Adding to 40013320 its reverse (2331004), we get a palindrome (42344324).

The spelling of 40013320 in words is "forty million, thirteen thousand, three hundred twenty".