43405994 has 8 divisors (see below), whose sum is σ = 68535840. Its totient is φ = 20560716.

The previous prime is 43405969. The next prime is 43406021. The reversal of 43405994 is 49950434.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Harshad number since it is a multiple of its sum of digits (38), and also a Moran number because the ratio is a prime number: 1142263 = 43405994 / (4 + 3 + 4 + 0 + 5 + 9 + 9 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 571094 + ... + 571169.

It is an arithmetic number, because the mean of its divisors is an integer number (8566980).

Almost surely, 2^43405994 is an apocalyptic number.

43405994 is a deficient number, since it is larger than the sum of its proper divisors (25129846).

43405994 is a wasteful number, since it uses less digits than its factorization.

43405994 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1142284.

The product of its (nonzero) digits is 77760, while the sum is 38.

The square root of 43405994 is about 6588.3225482667. The cubic root of 43405994 is about 351.4389575287.

The spelling of 43405994 in words is "forty-three million, four hundred five thousand, nine hundred ninety-four".