43991485 has 8 divisors (see below), whose sum is σ = 52843320. Its totient is φ = 35157504.

The previous prime is 43991473. The next prime is 43991491. The reversal of 43991485 is 58419934.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 6365529 + 37625956 = 2523^2 + 6134^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 43991485 - 2¹¹ = 43989437 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1749 + ... + 9541.

It is an arithmetic number, because the mean of its divisors is an integer number (6605415).

Almost surely, 2^43991485 is an apocalyptic number.

It is an amenable number.

43991485 is a deficient number, since it is larger than the sum of its proper divisors (8851835).

43991485 is a wasteful number, since it uses less digits than its factorization.

43991485 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8927.

The product of its digits is 155520, while the sum is 43.

The square root of 43991485 is about 6632.6077073803. The cubic root of 43991485 is about 353.0120586421.

The spelling of 43991485 in words is "forty-three million, nine hundred ninety-one thousand, four hundred eighty-five".