40736181 has 4 divisors (see below), whose sum is σ = 54314912. Its totient is φ = 27157452.

The previous prime is 40736177. The next prime is 40736183. The reversal of 40736181 is 18163704.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 40736181 - 2² = 40736177 is a prime.

It is a super-2 number, since 2×40736181² = 3318872884929522, 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 (40736183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6789361 + ... + 6789366.

It is an arithmetic number, because the mean of its divisors is an integer number (13578728).

Almost surely, 2^40736181 is an apocalyptic number.

It is an amenable number.

40736181 is a deficient number, since it is larger than the sum of its proper divisors (13578731).

40736181 is a wasteful number, since it uses less digits than its factorization.

40736181 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13578730.

The product of its (nonzero) digits is 4032, while the sum is 30.

The square root of 40736181 is about 6382.4901880066. The cubic root of 40736181 is about 344.0805342589.

Adding to 40736181 its reverse (18163704), we get a palindrome (58899885).

The spelling of 40736181 in words is "forty million, seven hundred thirty-six thousand, one hundred eighty-one".