40111989 has 8 divisors (see below), whose sum is σ = 53520960. Its totient is φ = 26722176.

The previous prime is 40111979. The next prime is 40111997. The reversal of 40111989 is 98911104.

40111989 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 40111989 - 2⁵ = 40111957 is a prime.

It is a super-2 number, since 2×40111989² = 3217943323072242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40111909) 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, 1152 + ... + 9030.

It is an arithmetic number, because the mean of its divisors is an integer number (6690120).

Almost surely, 2^40111989 is an apocalyptic number.

It is an amenable number.

40111989 is a deficient number, since it is larger than the sum of its proper divisors (13408971).

40111989 is a wasteful number, since it uses less digits than its factorization.

40111989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9579.

The product of its (nonzero) digits is 2592, while the sum is 33.

The square root of 40111989 is about 6333.4026399717. The cubic root of 40111989 is about 342.3140561010.

The spelling of 40111989 in words is "forty million, one hundred eleven thousand, nine hundred eighty-nine".