40127881 has 8 divisors (see below), whose sum is σ = 40915784. Its totient is φ = 39346560.

The previous prime is 40127849. The next prime is 40127887. The reversal of 40127881 is 18872104.

It can be written as a sum of positive squares in 4 ways, for example, as 3027600 + 37100281 = 1740^2 + 6091^2 .

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 40127881 - 2⁵ = 40127849 is a prime.

It is a super-5 number, since 5×40127881⁵ (a number of 39 digits) contains 55555 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (40127887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11695 + ... + 14731.

It is an arithmetic number, because the mean of its divisors is an integer number (5114473).

Almost surely, 2^40127881 is an apocalyptic number.

It is an amenable number.

40127881 is a deficient number, since it is larger than the sum of its proper divisors (787903).

40127881 is a wasteful number, since it uses less digits than its factorization.

40127881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3291.

The product of its (nonzero) digits is 3584, while the sum is 31.

The square root of 40127881 is about 6334.6571335787. The cubic root of 40127881 is about 342.3592573557.

Adding to 40127881 its reverse (18872104), we get a palindrome (58999985).

It can be divided in two parts, 401 and 27881, that added together give a palindrome (28282).

The spelling of 40127881 in words is "forty million, one hundred twenty-seven thousand, eight hundred eighty-one".