43072985 has 16 divisors (see below), whose sum is σ = 55242000. Its totient is φ = 32126976.

The previous prime is 43072979. The next prime is 43072987. The reversal of 43072985 is 58927034.

It can be written as a sum of positive squares in 8 ways, for example, as 9803161 + 33269824 = 3131^2 + 5768^2 .

It is a cyclic number.

It is not a de Polignac number, because 43072985 - 2¹⁶ = 43007449 is a prime.

It is a super-4 number, since 4×43072985⁴ (a number of 32 digits) contains 4444 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (43072987) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6941 + ... + 11589.

It is an arithmetic number, because the mean of its divisors is an integer number (3452625).

Almost surely, 2^43072985 is an apocalyptic number.

It is an amenable number.

43072985 is a deficient number, since it is larger than the sum of its proper divisors (12169015).

43072985 is a wasteful number, since it uses less digits than its factorization.

43072985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4780.

The product of its (nonzero) digits is 60480, while the sum is 38.

The square root of 43072985 is about 6563.0012189546. The cubic root of 43072985 is about 350.5379075716.

The spelling of 43072985 in words is "forty-three million, seventy-two thousand, nine hundred eighty-five".