40023412 has 36 divisors (see below), whose sum is σ = 82922308. Its totient is φ = 16790400.

The previous prime is 40023407. The next prime is 40023413. The reversal of 40023412 is 21432004.

40023412 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 7806436 + 32216976 = 2794^2 + 5676^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40023413) 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 11 ways as a sum of consecutive naturals, for example, 3112 + ... + 9472.

Almost surely, 2^40023412 is an apocalyptic number.

It is an amenable number.

40023412 is an abundant number, since it is smaller than the sum of its proper divisors (42898896).

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

40023412 is a wasteful number, since it uses less digits than its factorization.

40023412 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6400 (or 6387 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40023412 is about 6326.4059307003. The cubic root of 40023412 is about 342.0618995833.

Adding to 40023412 its reverse (21432004), we get a palindrome (61455416).

The spelling of 40023412 in words is "forty million, twenty-three thousand, four hundred twelve".