40423329 has 6 divisors (see below), whose sum is σ = 58389266. Its totient is φ = 26948880.

The previous prime is 40423321. The next prime is 40423333. The reversal of 40423329 is 92332404.

It is a happy number.

40423329 is a `hidden beast` number, since 404 + 233 + 29 = 666.

40423329 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 23184225 + 17239104 = 4815^2 + 4152^2 .

It is not a de Polignac number, because 40423329 - 2³ = 40423321 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (40423321) 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 5 ways as a sum of consecutive naturals, for example, 2245732 + ... + 2245749.

Almost surely, 2^40423329 is an apocalyptic number.

It is an amenable number.

40423329 is a deficient number, since it is larger than the sum of its proper divisors (17965937).

40423329 is a wasteful number, since it uses less digits than its factorization.

40423329 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4491487 (or 4491484 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 40423329 is about 6357.9343343573. The cubic root of 40423329 is about 343.1974287466.

The spelling of 40423329 in words is "forty million, four hundred twenty-three thousand, three hundred twenty-nine".