40022381 has 8 divisors (see below), whose sum is σ = 45790464. Its totient is φ = 34266960.

The previous prime is 40022377. The next prime is 40022413. The reversal of 40022381 is 18322004.

40022381 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 40022381 - 2² = 40022377 is a prime.

It is a super-2 number, since 2×40022381² = 3203581961818322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40022881) 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, 5036 + ... + 10266.

It is an arithmetic number, because the mean of its divisors is an integer number (5723808).

Almost surely, 2^40022381 is an apocalyptic number.

It is an amenable number.

40022381 is a deficient number, since it is larger than the sum of its proper divisors (5768083).

40022381 is a wasteful number, since it uses less digits than its factorization.

40022381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6331.

The product of its (nonzero) digits is 384, while the sum is 20.

The square root of 40022381 is about 6326.3244463116. The cubic root of 40022381 is about 342.0589623954.

Adding to 40022381 its reverse (18322004), we get a palindrome (58344385).

The spelling of 40022381 in words is "forty million, twenty-two thousand, three hundred eighty-one".