40144340 has 48 divisors (see below), whose sum is σ = 89812800. Its totient is φ = 15028992.

The previous prime is 40144339. The next prime is 40144417. The reversal of 40144340 is 4344104.

It is a super-2 number, since 2×40144340² = 3223136068071200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20).

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, 33227 + ... + 34413.

It is an arithmetic number, because the mean of its divisors is an integer number (1871100).

Almost surely, 2^40144340 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 40144340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44906400).

40144340 is an abundant number, since it is smaller than the sum of its proper divisors (49668460).

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

40144340 is a wasteful number, since it uses less digits than its factorization.

40144340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1304 (or 1302 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 20.

The square root of 40144340 is about 6335.9561235855. The cubic root of 40144340 is about 342.4060587371.

Adding to 40144340 its reverse (4344104), we get a palindrome (44488444).

The spelling of 40144340 in words is "forty million, one hundred forty-four thousand, three hundred forty".