40116381 has 8 divisors (see below), whose sum is σ = 53560800. Its totient is φ = 26708112.

The previous prime is 40116359. The next prime is 40116383. The reversal of 40116381 is 18361104.

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

It is not a de Polignac number, because 40116381 - 2⁷ = 40116253 is a prime.

It is a super-2 number, since 2×40116381² = 3218648049074322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40116383) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6331 + ... + 10968.

It is an arithmetic number, because the mean of its divisors is an integer number (6695100).

Almost surely, 2^40116381 is an apocalyptic number.

It is an amenable number.

40116381 is a deficient number, since it is larger than the sum of its proper divisors (13444419).

40116381 is a wasteful number, since it uses less digits than its factorization.

40116381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18075.

The product of its (nonzero) digits is 576, while the sum is 24.

The square root of 40116381 is about 6333.7493635287. The cubic root of 40116381 is about 342.3265493605.

Adding to 40116381 its reverse (18361104), we get a palindrome (58477485).

The spelling of 40116381 in words is "forty million, one hundred sixteen thousand, three hundred eighty-one".