40340244 has 48 divisors (see below), whose sum is σ = 108953600. Its totient is φ = 11378016.

The previous prime is 40340243. The next prime is 40340257. The reversal of 40340244 is 44204304.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a self number, because there is not a number n which added to its sum of digits gives 40340244.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40340243) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3597 + ... + 9675.

Almost surely, 2^40340244 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 40340244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (54476800).

40340244 is an abundant number, since it is smaller than the sum of its proper divisors (68613356).

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

40340244 is a wasteful number, since it uses less digits than its factorization.

40340244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6172 (or 6170 counting only the distinct ones).

The product of its (nonzero) digits is 1536, while the sum is 21.

The square root of 40340244 is about 6351.3970116818. The cubic root of 40340244 is about 342.9621346114.

Adding to 40340244 its reverse (44204304), we get a palindrome (84544548).

The spelling of 40340244 in words is "forty million, three hundred forty thousand, two hundred forty-four".