40536381 has 8 divisors (see below), whose sum is σ = 57227904. Its totient is φ = 25434560.

The previous prime is 40536343. The next prime is 40536383. The reversal of 40536381 is 18363504.

40536381 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 a cyclic number.

It is not a de Polignac number, because 40536381 - 2¹⁸ = 40274237 is a prime.

It is a super-2 number, since 2×40536381² = 3286396369154322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40536383) 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, 397365 + ... + 397466.

It is an arithmetic number, because the mean of its divisors is an integer number (7153488).

Almost surely, 2^40536381 is an apocalyptic number.

It is an amenable number.

40536381 is a deficient number, since it is larger than the sum of its proper divisors (16691523).

40536381 is a wasteful number, since it uses less digits than its factorization.

40536381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 794851.

The product of its (nonzero) digits is 8640, while the sum is 30.

The square root of 40536381 is about 6366.8187503651. The cubic root of 40536381 is about 343.5170712474.

Adding to 40536381 its reverse (18363504), we get a palindrome (58899885).

The spelling of 40536381 in words is "forty million, five hundred thirty-six thousand, three hundred eighty-one".