40127440 has 20 divisors (see below), whose sum is σ = 93296484. Its totient is φ = 16050944.

The previous prime is 40127407. The next prime is 40127453. The reversal of 40127440 is 4472104.

It can be written as a sum of positive squares in 2 ways, for example, as 21013056 + 19114384 = 4584^2 + 4372^2 .

It is a tau number, because it is divible by the number of its divisors (20).

It is a super-2 number, since 2×40127440² = 3220422881907200, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 250717 + ... + 250876.

Almost surely, 2^40127440 is an apocalyptic number.

40127440 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

40127440 is an abundant number, since it is smaller than the sum of its proper divisors (53169044).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

40127440 is a wasteful number, since it uses less digits than its factorization.

40127440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501606 (or 501600 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 22.

The square root of 40127440 is about 6334.6223249693. The cubic root of 40127440 is about 342.3580031905.

Adding to 40127440 its reverse (4472104), we get a palindrome (44599544).

The spelling of 40127440 in words is "forty million, one hundred twenty-seven thousand, four hundred forty".