43099940 has 48 divisors (see below), whose sum is σ = 99574272. Its totient is φ = 15570816.

The previous prime is 43099939. The next prime is 43099943. The reversal of 43099940 is 4999034.

It is a junction number, because it is equal to n+sod(n) for n = 43099894 and 43099903.

It is not an unprimeable number, because it can be changed into a prime (43099943) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10457 + ... + 13983.

It is an arithmetic number, because the mean of its divisors is an integer number (2074464).

Almost surely, 2^43099940 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 43099940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49787136).

43099940 is an abundant number, since it is smaller than the sum of its proper divisors (56474332).

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

43099940 is a wasteful number, since it uses less digits than its factorization.

43099940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3596 (or 3594 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 38.

The square root of 43099940 is about 6565.0544552197. The cubic root of 43099940 is about 350.6110143305.

The spelling of 43099940 in words is "forty-three million, ninety-nine thousand, nine hundred forty".