40133540 has 12 divisors (see below), whose sum is σ = 84280476. Its totient is φ = 16053408.

The previous prime is 40133539. The next prime is 40133543. The reversal of 40133540 is 4533104.

It can be written as a sum of positive squares in 2 ways, for example, as 20720704 + 19412836 = 4552^2 + 4406^2 .

It is a super-2 number, since 2×40133540² = 3221402065863200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (20), and also a Moran number because the ratio is a prime number: 2006677 = 40133540 / (4 + 0 + 1 + 3 + 3 + 5 + 4 + 0).

It is not an unprimeable number, because it can be changed into a prime (40133543) 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 3 ways as a sum of consecutive naturals, for example, 1003319 + ... + 1003358.

It is an arithmetic number, because the mean of its divisors is an integer number (7023373).

Almost surely, 2^40133540 is an apocalyptic number.

It is an amenable number.

40133540 is an abundant number, since it is smaller than the sum of its proper divisors (44146936).

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

40133540 is a wasteful number, since it uses less digits than its factorization.

40133540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2006686 (or 2006684 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 40133540 is about 6335.1037876265. The cubic root of 40133540 is about 342.3753502395.

Adding to 40133540 its reverse (4533104), we get a palindrome (44666644).

The spelling of 40133540 in words is "forty million, one hundred thirty-three thousand, five hundred forty".