43894389 has 64 divisors (see below), whose sum is σ = 78428160. Its totient is φ = 21150720.

The previous prime is 43894387. The next prime is 43894399. The reversal of 43894389 is 98349834.

It is not a de Polignac number, because 43894389 - 2¹ = 43894387 is a prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43894387) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 320329 + ... + 320465.

It is an arithmetic number, because the mean of its divisors is an integer number (1225440).

Almost surely, 2^43894389 is an apocalyptic number.

It is an amenable number.

43894389 is a deficient number, since it is larger than the sum of its proper divisors (34533771).

43894389 is a wasteful number, since it uses less digits than its factorization.

43894389 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250.

The product of its digits is 746496, while the sum is 48.

The square root of 43894389 is about 6625.2840693815. The cubic root of 43894389 is about 352.7521499550.

Subtracting 43894389 from its reverse (98349834), we obtain a palindrome (54455445).

It can be divided in two parts, 4389 and 4389, that added together give a palindrome (8778).

The spelling of 43894389 in words is "forty-three million, eight hundred ninety-four thousand, three hundred eighty-nine".