40809989 has 8 divisors (see below), whose sum is σ = 46055520. Its totient is φ = 35820400.

The previous prime is 40809917. The next prime is 40809991. The reversal of 40809989 is 98990804.

40809989 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 40809989 - 2¹² = 40805893 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40803989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63647 + ... + 64284.

It is an arithmetic number, because the mean of its divisors is an integer number (5756940).

Almost surely, 2^40809989 is an apocalyptic number.

It is an amenable number.

40809989 is a deficient number, since it is larger than the sum of its proper divisors (5245531).

40809989 is a wasteful number, since it uses less digits than its factorization.

40809989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127971.

The product of its (nonzero) digits is 186624, while the sum is 47.

The square root of 40809989 is about 6388.2696405208. The cubic root of 40809989 is about 344.2882167415.

The spelling of 40809989 in words is "forty million, eight hundred nine thousand, nine hundred eighty-nine".