40033540 has 12 divisors (see below), whose sum is σ = 84070476. Its totient is φ = 16013408.

The previous prime is 40033531. The next prime is 40033571. The reversal of 40033540 is 4533004.

It can be written as a sum of positive squares in 2 ways, for example, as 9585216 + 30448324 = 3096^2 + 5518^2 .

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, 1000819 + ... + 1000858.

It is an arithmetic number, because the mean of its divisors is an integer number (7005873).

Almost surely, 2^40033540 is an apocalyptic number.

It is an amenable number.

40033540 is an abundant number, since it is smaller than the sum of its proper divisors (44036936).

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

40033540 is a wasteful number, since it uses less digits than its factorization.

40033540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2001686 (or 2001684 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 19.

The square root of 40033540 is about 6327.2063345524. The cubic root of 40033540 is about 342.0907502864.

Adding to 40033540 its reverse (4533004), we get a palindrome (44566544).

The spelling of 40033540 in words is "forty million, thirty-three thousand, five hundred forty".