43973440 has 112 divisors (see below), whose sum is σ = 121871232. Its totient is φ = 14800896.

The previous prime is 43973437. The next prime is 43973453. The reversal of 43973440 is 4437934.

It is a tau number, because it is divible by the number of its divisors (112).

It is a junction number, because it is equal to n+sod(n) for n = 43973396 and 43973405.

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, 149934 + ... + 150226.

It is an arithmetic number, because the mean of its divisors is an integer number (1088136).

Almost surely, 2^43973440 is an apocalyptic number.

43973440 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 43973440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60935616).

43973440 is an abundant number, since it is smaller than the sum of its proper divisors (77897792).

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

43973440 is a wasteful number, since it uses less digits than its factorization.

43973440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 384 (or 374 counting only the distinct ones).

The product of its (nonzero) digits is 36288, while the sum is 34.

The square root of 43973440 is about 6631.2472431663. The cubic root of 43973440 is about 352.9637843470.

The spelling of 43973440 in words is "forty-three million, nine hundred seventy-three thousand, four hundred forty".