40144224 has 24 divisors (see below), whose sum is σ = 105378840. Its totient is φ = 13381376.

The previous prime is 40144183. The next prime is 40144229. The reversal of 40144224 is 42244104.

It is a tau number, because it is divible by the number of its divisors (24).

It is a super-2 number, since 2×40144224² = 3223117441124352, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 40144224.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40144229) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 208989 + ... + 209180.

It is an arithmetic number, because the mean of its divisors is an integer number (4390785).

Almost surely, 2^40144224 is an apocalyptic number.

It is an amenable number.

40144224 is an abundant number, since it is smaller than the sum of its proper divisors (65234616).

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

40144224 is a wasteful number, since it uses less digits than its factorization.

40144224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418182 (or 418174 counting only the distinct ones).

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

The square root of 40144224 is about 6335.9469694750. The cubic root of 40144224 is about 342.4057289343.

Adding to 40144224 its reverse (42244104), we get a palindrome (82388328).

The spelling of 40144224 in words is "forty million, one hundred forty-four thousand, two hundred twenty-four".