40144220 has 24 divisors (see below), whose sum is σ = 84463008. Its totient is φ = 16027200.

The previous prime is 40144183. The next prime is 40144229. The reversal of 40144220 is 2244104.

It is a super-2 number, since 2×40144220² = 3223116798816800, which contains 22 as substring.

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 7 ways as a sum of consecutive naturals, for example, 11030 + ... + 14210.

It is an arithmetic number, because the mean of its divisors is an integer number (3519292).

Almost surely, 2^40144220 is an apocalyptic number.

It is an amenable number.

40144220 is an abundant number, since it is smaller than the sum of its proper divisors (44318788).

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

40144220 is a wasteful number, since it uses less digits than its factorization.

40144220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3821 (or 3819 counting only the distinct ones).

The product of its (nonzero) digits is 256, while the sum is 17.

The square root of 40144220 is about 6335.9466538158. The cubic root of 40144220 is about 342.4057175618.

Adding to 40144220 its reverse (2244104), we get a palindrome (42388324).

The spelling of 40144220 in words is "forty million, one hundred forty-four thousand, two hundred twenty".