40193938 has 8 divisors (see below), whose sum is σ = 60379020. Its totient is φ = 20067600.

The previous prime is 40193929. The next prime is 40193941. The reversal of 40193938 is 83939104.

40193938 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 2 ways, for example, as 34963569 + 5230369 = 5913^2 + 2287^2 .

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

It is a nialpdrome in base 7.

It is a junction number, because it is equal to n+sod(n) for n = 40193897 and 40193906.

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, 12933 + ... + 15736.

Almost surely, 2^40193938 is an apocalyptic number.

40193938 is a deficient number, since it is larger than the sum of its proper divisors (20185082).

40193938 is a wasteful number, since it uses less digits than its factorization.

40193938 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29372.

The product of its (nonzero) digits is 23328, while the sum is 37.

The square root of 40193938 is about 6339.8689260899. The cubic root of 40193938 is about 342.5470139877.

The spelling of 40193938 in words is "forty million, one hundred ninety-three thousand, nine hundred thirty-eight".