40335381 has 8 divisors (see below), whose sum is σ = 59756160. Its totient is φ = 26890236.

The previous prime is 40335377. The next prime is 40335389. The reversal of 40335381 is 18353304.

It is a happy number.

40335381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40335381 - 2² = 40335377 is a prime.

It is a super-2 number, since 2×40335381² = 3253885920830322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27), and also a Moran number because the ratio is a prime number: 1493903 = 40335381 / (4 + 0 + 3 + 3 + 5 + 3 + 8 + 1).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40335389) 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, 746925 + ... + 746978.

It is an arithmetic number, because the mean of its divisors is an integer number (7469520).

Almost surely, 2^40335381 is an apocalyptic number.

It is an amenable number.

40335381 is a deficient number, since it is larger than the sum of its proper divisors (19420779).

40335381 is a wasteful number, since it uses less digits than its factorization.

40335381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1493912 (or 1493906 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 27.

The square root of 40335381 is about 6351.0141709809. The cubic root of 40335381 is about 342.9483527423.

Adding to 40335381 its reverse (18353304), we get a palindrome (58688685).

The spelling of 40335381 in words is "forty million, three hundred thirty-five thousand, three hundred eighty-one".