40840033 has 16 divisors (see below), whose sum is σ = 45838800. Its totient is φ = 36341760.

The previous prime is 40840031. The next prime is 40840043. The reversal of 40840033 is 33004804.

It can be written as a sum of positive squares in 8 ways, for example, as 18258529 + 22581504 = 4273^2 + 4752^2 .

It is not a de Polignac number, because 40840033 - 2¹ = 40840031 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40839986 and 40840013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40840031) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63393 + ... + 64033.

It is an arithmetic number, because the mean of its divisors is an integer number (2864925).

Almost surely, 2^40840033 is an apocalyptic number.

It is an amenable number.

40840033 is a deficient number, since it is larger than the sum of its proper divisors (4998767).

40840033 is an equidigital number, since it uses as much as digits as its factorization.

40840033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 709 (or 683 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 22.

The square root of 40840033 is about 6390.6207053775. The cubic root of 40840033 is about 344.3726834626.

Adding to 40840033 its reverse (33004804), we get a palindrome (73844837).

The spelling of 40840033 in words is "forty million, eight hundred forty thousand, thirty-three".