40305244 has 48 divisors (see below), whose sum is σ = 85176000. Its totient is φ = 16661568.

The previous prime is 40305241. The next prime is 40305253. The reversal of 40305244 is 44250304.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40305241) 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 15 ways as a sum of consecutive naturals, for example, 39282 + ... + 40294.

It is an arithmetic number, because the mean of its divisors is an integer number (1774500).

Almost surely, 2^40305244 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 40305244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (42588000).

40305244 is an abundant number, since it is smaller than the sum of its proper divisors (44870756).

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

40305244 is a wasteful number, since it uses less digits than its factorization.

40305244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1067 (or 1051 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 22.

The square root of 40305244 is about 6348.6411144433. The cubic root of 40305244 is about 342.8629189834.

Adding to 40305244 its reverse (44250304), we get a palindrome (84555548).

The spelling of 40305244 in words is "forty million, three hundred five thousand, two hundred forty-four".