40040252 has 36 divisors (see below), whose sum is σ = 81913104. Its totient is φ = 17075520.

The previous prime is 40040249. The next prime is 40040257. The reversal of 40040252 is 25204004.

It is a self number, because there is not a number n which added to its sum of digits gives 40040252.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040257) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 54713 + ... + 55439.

It is an arithmetic number, because the mean of its divisors is an integer number (2275364).

Almost surely, 2^40040252 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 40040252, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40956552).

40040252 is an abundant number, since it is smaller than the sum of its proper divisors (41872852).

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

40040252 is a wasteful number, since it uses less digits than its factorization.

40040252 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1026 (or 1017 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 17.

The square root of 40040252 is about 6327.7367201868. The cubic root of 40040252 is about 342.1098674634.

Adding to 40040252 its reverse (25204004), we get a palindrome (65244256).

The spelling of 40040252 in words is "forty million, forty thousand, two hundred fifty-two".