40040712 has 48 divisors (see below), whose sum is σ = 114826140. Its totient is φ = 12561408.

The previous prime is 40040711. The next prime is 40040713. The reversal of 40040712 is 21704004.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (40040711) and next prime (40040713).

It can be written as a sum of positive squares in 2 ways, for example, as 39012516 + 1028196 = 6246^2 + 1014^2 .

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

It is not an unprimeable number, because it can be changed into a prime (40040711) 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 11 ways as a sum of consecutive naturals, for example, 15133 + ... + 17580.

Almost surely, 2^40040712 is an apocalyptic number.

It is an amenable number.

40040712 is an abundant number, since it is smaller than the sum of its proper divisors (74785428).

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

40040712 is a wasteful number, since it uses less digits than its factorization.

40040712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32742 (or 32735 counting only the distinct ones).

The product of its (nonzero) digits is 224, while the sum is 18.

The square root of 40040712 is about 6327.7730679916. The cubic root of 40040712 is about 342.1111775612. Note that the first 4 decimals are identical.

Adding to 40040712 its reverse (21704004), we get a palindrome (61744716).

The spelling of 40040712 in words is "forty million, forty thousand, seven hundred twelve".