40442544 has 80 divisors (see below), whose sum is σ = 116956800. Its totient is φ = 13379904.

The previous prime is 40442491. The next prime is 40442561. The reversal of 40442544 is 44524404.

It is a happy number.

40442544 is a `hidden beast` number, since 404 + 4 + 254 + 4 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

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, 77067 + ... + 77589.

It is an arithmetic number, because the mean of its divisors is an integer number (1461960).

Almost surely, 2^40442544 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 40442544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (58478400).

40442544 is an abundant number, since it is smaller than the sum of its proper divisors (76514256).

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

40442544 is a wasteful number, since it uses less digits than its factorization.

40442544 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 719 (or 707 counting only the distinct ones).

The product of its (nonzero) digits is 10240, while the sum is 27.

The square root of 40442544 is about 6359.4452588256. The cubic root of 40442544 is about 343.2517991159.

Adding to 40442544 its reverse (44524404), we get a palindrome (84966948).

The spelling of 40442544 in words is "forty million, four hundred forty-two thousand, five hundred forty-four".