40221689 has 8 divisors (see below), whose sum is σ = 42432000. Its totient is φ = 38020752.

The previous prime is 40221683. The next prime is 40221691. The reversal of 40221689 is 98612204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221689 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40221683) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7592 + ... + 11750.

It is an arithmetic number, because the mean of its divisors is an integer number (5304000).

Almost surely, 2^40221689 is an apocalyptic number.

It is an amenable number.

40221689 is a deficient number, since it is larger than the sum of its proper divisors (2210311).

40221689 is a wasteful number, since it uses less digits than its factorization.

40221689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4687.

The product of its (nonzero) digits is 6912, while the sum is 32.

The square root of 40221689 is about 6342.0571583675. The cubic root of 40221689 is about 342.6258304773.

The spelling of 40221689 in words is "forty million, two hundred twenty-one thousand, six hundred eighty-nine".