43440144 has 80 divisors (see below), whose sum is σ = 126688320. Its totient is φ = 12705280.

The previous prime is 43440119. The next prime is 43440149. The reversal of 43440144 is 44104434.

It is a super-2 number, since 2×43440144² = 3774092221481472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43440149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13894 + ... + 16730.

It is an arithmetic number, because the mean of its divisors is an integer number (1583604).

Almost surely, 2^43440144 is an apocalyptic number.

43440144 is a gapful number since it is divisible by the number (44) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43440144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63344160).

43440144 is an abundant number, since it is smaller than the sum of its proper divisors (83248176).

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

43440144 is a wasteful number, since it uses less digits than its factorization.

43440144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2888 (or 2882 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 43440144 is about 6590.9137454529. The cubic root of 43440144 is about 351.5310991371.

Adding to 43440144 its reverse (44104434), we get a palindrome (87544578).

The spelling of 43440144 in words is "forty-three million, four hundred forty thousand, one hundred forty-four".