40660238 has 4 divisors (see below), whose sum is σ = 60990360. Its totient is φ = 20330118.

The previous prime is 40660237. The next prime is 40660303. The reversal of 40660238 is 83206604.

40660238 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 is a self number, because there is not a number n which added to its sum of digits gives 40660238.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40660237) 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 as a sum of consecutive naturals, namely, 10165058 + ... + 10165061.

It is an arithmetic number, because the mean of its divisors is an integer number (15247590).

Almost surely, 2^40660238 is an apocalyptic number.

40660238 is a deficient number, since it is larger than the sum of its proper divisors (20330122).

40660238 is a wasteful number, since it uses less digits than its factorization.

40660238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20330121.

The product of its (nonzero) digits is 6912, while the sum is 29.

The square root of 40660238 is about 6376.5380889633. The cubic root of 40660238 is about 343.8665822530.

The spelling of 40660238 in words is "forty million, six hundred sixty thousand, two hundred thirty-eight".