40170443 has 4 divisors (see below), whose sum is σ = 41917008. Its totient is φ = 38423880.

The previous prime is 40170437. The next prime is 40170457. The reversal of 40170443 is 34407104.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40170443 - 2¹⁶ = 40104907 is a prime.

It is a super-2 number, since 2×40170443² = 3227328981632498, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (23), and also a Moran number because the ratio is a prime number: 1746541 = 40170443 / (4 + 0 + 1 + 7 + 0 + 4 + 4 + 3).

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40170463) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 873248 + ... + 873293.

It is an arithmetic number, because the mean of its divisors is an integer number (10479252).

Almost surely, 2^40170443 is an apocalyptic number.

40170443 is a deficient number, since it is larger than the sum of its proper divisors (1746565).

40170443 is a wasteful number, since it uses less digits than its factorization.

40170443 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1746564.

The product of its (nonzero) digits is 1344, while the sum is 23.

The square root of 40170443 is about 6338.0156989392. The cubic root of 40170443 is about 342.4802567340.

Adding to 40170443 its reverse (34407104), we get a palindrome (74577547).

The spelling of 40170443 in words is "forty million, one hundred seventy thousand, four hundred forty-three".