43940193 has 8 divisors (see below), whose sum is σ = 63913056. Its totient is φ = 26630400.

The previous prime is 43940177. The next prime is 43940203. The reversal of 43940193 is 39104934.

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

It is not a de Polignac number, because 43940193 - 2⁴ = 43940177 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33), and also a Moran number because the ratio is a prime number: 1331521 = 43940193 / (4 + 3 + 9 + 4 + 0 + 1 + 9 + 3).

It is not an unprimeable number, because it can be changed into a prime (43940153) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 665728 + ... + 665793.

It is an arithmetic number, because the mean of its divisors is an integer number (7989132).

Almost surely, 2^43940193 is an apocalyptic number.

It is an amenable number.

43940193 is a deficient number, since it is larger than the sum of its proper divisors (19972863).

43940193 is a wasteful number, since it uses less digits than its factorization.

43940193 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1331535.

The product of its (nonzero) digits is 11664, while the sum is 33.

The square root of 43940193 is about 6628.7399255062. The cubic root of 43940193 is about 352.8748068061.

The spelling of 43940193 in words is "forty-three million, nine hundred forty thousand, one hundred ninety-three".