43394538 has 16 divisors (see below), whose sum is σ = 94679136. Its totient is φ = 13149840.

The previous prime is 43394521. The next prime is 43394567. The reversal of 43394538 is 83549334.

43394538 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 43394496 and 43394505.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 328681 + ... + 328812.

It is an arithmetic number, because the mean of its divisors is an integer number (5917446).

Almost surely, 2^43394538 is an apocalyptic number.

43394538 is an abundant number, since it is smaller than the sum of its proper divisors (51284598).

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

43394538 is a wasteful number, since it uses less digits than its factorization.

43394538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 657509.

The product of its digits is 155520, while the sum is 39.

The square root of 43394538 is about 6587.4530738367. The cubic root of 43394538 is about 351.4080367689.

The spelling of 43394538 in words is "forty-three million, three hundred ninety-four thousand, five hundred thirty-eight".