40440252 has 24 divisors (see below), whose sum is σ = 95961600. Its totient is φ = 13251376.

The previous prime is 40440221. The next prime is 40440259. The reversal of 40440252 is 25204404.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40440259) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 27852 + ... + 29267.

It is an arithmetic number, because the mean of its divisors is an integer number (3998400).

Almost surely, 2^40440252 is an apocalyptic number.

It is an amenable number.

40440252 is an abundant number, since it is smaller than the sum of its proper divisors (55521348).

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

40440252 is a wasteful number, since it uses less digits than its factorization.

40440252 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57185 (or 57183 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40440252 is about 6359.2650518751. The cubic root of 40440252 is about 343.2453146245.

Adding to 40440252 its reverse (25204404), we get a palindrome (65644656).

The spelling of 40440252 in words is "forty million, four hundred forty thousand, two hundred fifty-two".