43989725 has 12 divisors (see below), whose sum is σ = 58743636. Its totient is φ = 32484480.

The previous prime is 43989709. The next prime is 43989749. The reversal of 43989725 is 52798934.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 2477476 + 41512249 = 1574^2 + 6443^2 .

It is not a de Polignac number, because 43989725 - 2⁴ = 43989709 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 43989725.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67352 + ... + 68001.

It is an arithmetic number, because the mean of its divisors is an integer number (4895303).

Almost surely, 2^43989725 is an apocalyptic number.

It is an amenable number.

43989725 is a deficient number, since it is larger than the sum of its proper divisors (14753911).

43989725 is a wasteful number, since it uses less digits than its factorization.

43989725 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 135376 (or 135371 counting only the distinct ones).

The product of its digits is 544320, while the sum is 47.

The square root of 43989725 is about 6632.4750282229. The cubic root of 43989725 is about 353.0073508408.

The spelling of 43989725 in words is "forty-three million, nine hundred eighty-nine thousand, seven hundred twenty-five".