43440920 has 64 divisors (see below), whose sum is σ = 102954240. Its totient is φ = 16473600.

The previous prime is 43440911. The next prime is 43440941. The reversal of 43440920 is 2904434.

43440920 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×43440920² = 3774227060892800, 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 43440920.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 65390 + ... + 66050.

It is an arithmetic number, because the mean of its divisors is an integer number (1608660).

Almost surely, 2^43440920 is an apocalyptic number.

43440920 is a gapful number since it is divisible by the number (40) 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 43440920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51477120).

43440920 is an abundant number, since it is smaller than the sum of its proper divisors (59513320).

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

43440920 is a wasteful number, since it uses less digits than its factorization.

43440920 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 756 (or 752 counting only the distinct ones).

The product of its (nonzero) digits is 3456, while the sum is 26.

The square root of 43440920 is about 6590.9726141139. The cubic root of 43440920 is about 351.5331923355.

The spelling of 43440920 in words is "forty-three million, four hundred forty thousand, nine hundred twenty".