40989443 has 4 divisors (see below), whose sum is σ = 44715768. Its totient is φ = 37263120.

The previous prime is 40989439. The next prime is 40989469. The reversal of 40989443 is 34498904.

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 40989443 - 2² = 40989439 is a prime.

It is a Duffinian number.

It is a plaindrome in base 12.

It is a self number, because there is not a number n which added to its sum of digits gives 40989443.

It is not an unprimeable number, because it can be changed into a prime (40989643) 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, 1863146 + ... + 1863167.

It is an arithmetic number, because the mean of its divisors is an integer number (11178942).

Almost surely, 2^40989443 is an apocalyptic number.

40989443 is a deficient number, since it is larger than the sum of its proper divisors (3726325).

40989443 is a wasteful number, since it uses less digits than its factorization.

40989443 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3726324.

The product of its (nonzero) digits is 124416, while the sum is 41.

The square root of 40989443 is about 6402.2998211580. The cubic root of 40989443 is about 344.7921257015.

The spelling of 40989443 in words is "forty million, nine hundred eighty-nine thousand, four hundred forty-three".