40921244 has 72 divisors (see below), whose sum is σ = 93868320. Its totient is φ = 15197184.

The previous prime is 40921229. The next prime is 40921249. The reversal of 40921244 is 44212904.

It is a Harshad number since it is a multiple of its sum of digits (26).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40921249) 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 23 ways as a sum of consecutive naturals, for example, 105002 + ... + 105390.

Almost surely, 2^40921244 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 40921244, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (46934160).

40921244 is an abundant number, since it is smaller than the sum of its proper divisors (52947076).

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

40921244 is a wasteful number, since it uses less digits than its factorization.

40921244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 447 (or 428 counting only the distinct ones).

The product of its (nonzero) digits is 2304, while the sum is 26.

The square root of 40921244 is about 6396.9714709384. The cubic root of 40921244 is about 344.6007956922.

The spelling of 40921244 in words is "forty million, nine hundred twenty-one thousand, two hundred forty-four".