40220544 has 128 divisors (see below), whose sum is σ = 131604480. Its totient is φ = 10598400.

The previous prime is 40220527. The next prime is 40220561. The reversal of 40220544 is 44502204.

It is an interprime number because it is at equal distance from previous prime (40220527) and next prime (40220561).

It is a tau number, because it is divible by the number of its divisors (128).

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 40220544.

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, 34369 + ... + 35519.

It is an arithmetic number, because the mean of its divisors is an integer number (1028160).

Almost surely, 2^40220544 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 40220544, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (65802240).

40220544 is an abundant number, since it is smaller than the sum of its proper divisors (91383936).

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

40220544 is a wasteful number, since it uses less digits than its factorization.

40220544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1188 (or 1176 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 21.

The square root of 40220544 is about 6341.9668873308. The cubic root of 40220544 is about 342.6225792439.

Adding to 40220544 its reverse (44502204), we get a palindrome (84722748).

The spelling of 40220544 in words is "forty million, two hundred twenty thousand, five hundred forty-four".