40388533 has 4 divisors (see below), whose sum is σ = 40759180. Its totient is φ = 40017888.

The previous prime is 40388519. The next prime is 40388599. The reversal of 40388533 is 33588304.

40388533 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 24532209 + 15856324 = 4953^2 + 3982^2 .

It is a cyclic number.

It is not a de Polignac number, because 40388533 - 2⁹ = 40388021 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 (40388233) 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 3 ways as a sum of consecutive naturals, for example, 185160 + ... + 185377.

It is an arithmetic number, because the mean of its divisors is an integer number (10189795).

Almost surely, 2^40388533 is an apocalyptic number.

It is an amenable number.

40388533 is a deficient number, since it is larger than the sum of its proper divisors (370647).

40388533 is a wasteful number, since it uses less digits than its factorization.

40388533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 370646.

The product of its (nonzero) digits is 34560, while the sum is 34.

The square root of 40388533 is about 6355.1973218776. The cubic root of 40388533 is about 343.0989268324.

The spelling of 40388533 in words is "forty million, three hundred eighty-eight thousand, five hundred thirty-three".