40421244 has 48 divisors (see below), whose sum is σ = 99983520. Its totient is φ = 12687360.

The previous prime is 40421239. The next prime is 40421263. The reversal of 40421244 is 44212404.

It is a self number, because there is not a number n which added to its sum of digits gives 40421244.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12852 + ... + 15684.

It is an arithmetic number, because the mean of its divisors is an integer number (2082990).

Almost surely, 2^40421244 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 40421244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49991760).

40421244 is an abundant number, since it is smaller than the sum of its proper divisors (59562276).

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

40421244 is a wasteful number, since it uses less digits than its factorization.

40421244 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2910 (or 2908 counting only the distinct ones).

The product of its (nonzero) digits is 1024, while the sum is 21.

The square root of 40421244 is about 6357.7703638933. The cubic root of 40421244 is about 343.1915280373.

Adding to 40421244 its reverse (44212404), we get a palindrome (84633648).

The spelling of 40421244 in words is "forty million, four hundred twenty-one thousand, two hundred forty-four".