40727181 has 24 divisors (see below), whose sum is σ = 61953696. Its totient is φ = 23599840.

The previous prime is 40727173. The next prime is 40727191. The reversal of 40727181 is 18172704.

It is not a de Polignac number, because 40727181 - 2³ = 40727173 is a prime.

It is a super-4 number, since 4×40727181⁴ (a number of 32 digits) contains 4444 as substring. Note that it is a super-d number also for d = 2.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40727101) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 16291 + ... + 18623.

It is an arithmetic number, because the mean of its divisors is an integer number (2581404).

Almost surely, 2^40727181 is an apocalyptic number.

It is an amenable number.

40727181 is a deficient number, since it is larger than the sum of its proper divisors (21226515).

40727181 is a wasteful number, since it uses less digits than its factorization.

40727181 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2393 (or 2370 counting only the distinct ones).

The product of its (nonzero) digits is 3136, while the sum is 30.

The square root of 40727181 is about 6381.7850950968. The cubic root of 40727181 is about 344.0551927171.

Adding to 40727181 its reverse (18172704), we get a palindrome (58899885).

The spelling of 40727181 in words is "forty million, seven hundred twenty-seven thousand, one hundred eighty-one".