43385985 has 12 divisors (see below), whose sum is σ = 75202452. Its totient is φ = 23139168.

The previous prime is 43385983. The next prime is 43386043. The reversal of 43385985 is 58958334.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 31002624 + 12383361 = 5568^2 + 3519^2 .

It is not a de Polignac number, because 43385985 - 2¹ = 43385983 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 964133 = 43385985 / (4 + 3 + 3 + 8 + 5 + 9 + 8 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 43385985.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (43385983) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 482022 + ... + 482111.

It is an arithmetic number, because the mean of its divisors is an integer number (6266871).

Almost surely, 2^43385985 is an apocalyptic number.

43385985 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

It is an amenable number.

43385985 is a deficient number, since it is larger than the sum of its proper divisors (31816467).

43385985 is a wasteful number, since it uses less digits than its factorization.

43385985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 964144 (or 964141 counting only the distinct ones).

The product of its digits is 518400, while the sum is 45.

The square root of 43385985 is about 6586.8038531597. The cubic root of 43385985 is about 351.3849479151.

The spelling of 43385985 in words is "forty-three million, three hundred eighty-five thousand, nine hundred eighty-five".