43109940 has 48 divisors (see below), whose sum is σ = 121201920. Its totient is φ = 11448960.

The previous prime is 43109939. The next prime is 43109947. The reversal of 43109940 is 4990134.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 43109898 and 43109907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43109947) 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, 14805 + ... + 17475.

It is an arithmetic number, because the mean of its divisors is an integer number (2525040).

Almost surely, 2^43109940 is an apocalyptic number.

It is an amenable number.

43109940 is an abundant number, since it is smaller than the sum of its proper divisors (78091980).

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

43109940 is a wasteful number, since it uses less digits than its factorization.

43109940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2952 (or 2950 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 30.

The square root of 43109940 is about 6565.8160193536. The cubic root of 43109940 is about 350.6381283591.

The spelling of 43109940 in words is "forty-three million, one hundred nine thousand, nine hundred forty".