40408533 has 24 divisors (see below), whose sum is σ = 64037376. Its totient is φ = 24350400.

The previous prime is 40408523. The next prime is 40408547. The reversal of 40408533 is 33580404.

It is a happy number.

40408533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 40408533 - 2⁴ = 40408517 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 40408497 and 40408506.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40408523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 17841 + ... + 19977.

It is an arithmetic number, because the mean of its divisors is an integer number (2668224).

Almost surely, 2^40408533 is an apocalyptic number.

It is an amenable number.

40408533 is a deficient number, since it is larger than the sum of its proper divisors (23628843).

40408533 is a wasteful number, since it uses less digits than its factorization.

40408533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2345 (or 2342 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 40408533 is about 6356.7706423938. The cubic root of 40408533 is about 343.1555505461.

Adding to 40408533 its reverse (33580404), we get a palindrome (73988937).

The spelling of 40408533 in words is "forty million, four hundred eight thousand, five hundred thirty-three".