43778942 has 8 divisors (see below), whose sum is σ = 65696832. Its totient is φ = 21880000.

The previous prime is 43778941. The next prime is 43778947. The reversal of 43778942 is 24987734.

43778942 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a junction number, because it is equal to n+sod(n) for n = 43778893 and 43778902.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43778941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5267 + ... + 10737.

It is an arithmetic number, because the mean of its divisors is an integer number (8212104).

Almost surely, 2^43778942 is an apocalyptic number.

43778942 is a deficient number, since it is larger than the sum of its proper divisors (21917890).

43778942 is a wasteful number, since it uses less digits than its factorization.

43778942 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9474.

The product of its digits is 338688, while the sum is 44.

The square root of 43778942 is about 6616.5657255105. The cubic root of 43778942 is about 352.4426196358.

The spelling of 43778942 in words is "forty-three million, seven hundred seventy-eight thousand, nine hundred forty-two".