40040453 has 4 divisors (see below), whose sum is σ = 40074060. Its totient is φ = 40006848.

The previous prime is 40040411. The next prime is 40040471. The reversal of 40040453 is 35404004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14010049 + 26030404 = 3743^2 + 5102^2 .

It is a cyclic number.

It is not a de Polignac number, because 40040453 - 2⁸ = 40040197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40040153) 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, 14948 + ... + 17421.

It is an arithmetic number, because the mean of its divisors is an integer number (10018515).

Almost surely, 2^40040453 is an apocalyptic number.

It is an amenable number.

40040453 is a deficient number, since it is larger than the sum of its proper divisors (33607).

40040453 is a wasteful number, since it uses less digits than its factorization.

40040453 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33606.

The product of its (nonzero) digits is 960, while the sum is 20.

The square root of 40040453 is about 6327.7526026228. The cubic root of 40040453 is about 342.1104399204.

Adding to 40040453 its reverse (35404004), we get a palindrome (75444457).

The spelling of 40040453 in words is "forty million, forty thousand, four hundred fifty-three".