40043140 has 12 divisors (see below), whose sum is σ = 84090636. Its totient is φ = 16017248.

The previous prime is 40043119. The next prime is 40043141. The reversal of 40043140 is 4134004.

It can be written as a sum of positive squares in 2 ways, for example, as 29506624 + 10536516 = 5432^2 + 3246^2 .

It is a super-3 number, since 3×40043140³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not an unprimeable number, because it can be changed into a prime (40043141) 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, 1001059 + ... + 1001098.

It is an arithmetic number, because the mean of its divisors is an integer number (7007553).

Almost surely, 2^40043140 is an apocalyptic number.

It is an amenable number.

40043140 is an abundant number, since it is smaller than the sum of its proper divisors (44047496).

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

40043140 is a wasteful number, since it uses less digits than its factorization.

40043140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2002166 (or 2002164 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 16.

The square root of 40043140 is about 6327.9649177283. The cubic root of 40043140 is about 342.1180924328.

Adding to 40043140 its reverse (4134004), we get a palindrome (44177144).

The spelling of 40043140 in words is "forty million, forty-three thousand, one hundred forty".