40645238 has 8 divisors (see below), whose sum is σ = 61143600. Its totient is φ = 20264040.

The previous prime is 40645229. The next prime is 40645261. The reversal of 40645238 is 83254604.

40645238 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

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, 28418 + ... + 29813.

It is an arithmetic number, because the mean of its divisors is an integer number (7642950).

Almost surely, 2^40645238 is an apocalyptic number.

40645238 is a deficient number, since it is larger than the sum of its proper divisors (20498362).

40645238 is a wasteful number, since it uses less digits than its factorization.

40645238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 58582.

The product of its (nonzero) digits is 23040, while the sum is 32.

The square root of 40645238 is about 6375.3617936553. The cubic root of 40645238 is about 343.8242916894.

The spelling of 40645238 in words is "forty million, six hundred forty-five thousand, two hundred thirty-eight".