40381889 has 8 divisors (see below), whose sum is σ = 41061888. Its totient is φ = 39705120.

The previous prime is 40381879. The next prime is 40381927. The reversal of 40381889 is 98818304.

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-40381889 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 (40381819) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42629 + ... + 43565.

It is an arithmetic number, because the mean of its divisors is an integer number (5132736).

Almost surely, 2^40381889 is an apocalyptic number.

It is an amenable number.

40381889 is a deficient number, since it is larger than the sum of its proper divisors (679999).

40381889 is an equidigital number, since it uses as much as digits as its factorization.

40381889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1615.

The product of its (nonzero) digits is 55296, while the sum is 41.

The square root of 40381889 is about 6354.6745786075. The cubic root of 40381889 is about 343.0801122984.

The spelling of 40381889 in words is "forty million, three hundred eighty-one thousand, eight hundred eighty-nine".