43349940 has 144 divisors (see below), whose sum is σ = 141418368. Its totient is φ = 10720512.

The previous prime is 43349939. The next prime is 43349941. The reversal of 43349940 is 4994334.

It is an interprime number because it is at equal distance from previous prime (43349939) and next prime (43349941).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 43349895 and 43349904.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43349941) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 153039 + ... + 153321.

It is an arithmetic number, because the mean of its divisors is an integer number (982072).

Almost surely, 2^43349940 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 43349940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (70709184).

43349940 is an abundant number, since it is smaller than the sum of its proper divisors (98068428).

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

43349940 is a wasteful number, since it uses less digits than its factorization.

43349940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 358 (or 353 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 36.

The square root of 43349940 is about 6584.0671321000. The cubic root of 43349940 is about 351.2876109555.

The spelling of 43349940 in words is "forty-three million, three hundred forty-nine thousand, nine hundred forty".