43943920 has 40 divisors (see below), whose sum is σ = 103180896. Its totient is φ = 17403648.

The previous prime is 43943899. The next prime is 43943947. The reversal of 43943920 is 2934934.

It is a tau number, because it is divible by the number of its divisors (40).

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, 5574 + ... + 10906.

Almost surely, 2^43943920 is an apocalyptic number.

43943920 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 43943920, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (51590448).

43943920 is an abundant number, since it is smaller than the sum of its proper divisors (59236976).

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

43943920 is a wasteful number, since it uses less digits than its factorization.

43943920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5449 (or 5443 counting only the distinct ones).

The product of its (nonzero) digits is 23328, while the sum is 34.

The square root of 43943920 is about 6629.0210438646. The cubic root of 43943920 is about 352.8847834519.

The spelling of 43943920 in words is "forty-three million, nine hundred forty-three thousand, nine hundred twenty".