40144384 has 80 divisors (see below), whose sum is σ = 95851008. Its totient is φ = 16422912.

The previous prime is 40144339. The next prime is 40144417. The reversal of 40144384 is 48344104.

It is a super-2 number, since 2×40144384² = 3223143133478912, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 82189 + ... + 82675.

Almost surely, 2^40144384 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 40144384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47925504).

40144384 is an abundant number, since it is smaller than the sum of its proper divisors (55706624).

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

40144384 is an equidigital number, since it uses as much as digits as its factorization.

40144384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 535 (or 519 counting only the distinct ones).

The product of its (nonzero) digits is 6144, while the sum is 28.

The square root of 40144384 is about 6335.9595958308. The cubic root of 40144384 is about 342.4061838345.

Adding to 40144384 its reverse (48344104), we get a palindrome (88488488).

The spelling of 40144384 in words is "forty million, one hundred forty-four thousand, three hundred eighty-four".