38391240506 has 8 divisors (see below), whose sum is σ = 57699999540. Its totient is φ = 19157907328.

The previous prime is 38391240497. The next prime is 38391240523. The reversal of 38391240506 is 60504219383.

It can be written as a sum of positive squares in 2 ways, for example, as 33927798025 + 4463442481 = 184195^2 + 66809^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18855191 + ... + 18857226.

Almost surely, 2^38391240506 is an apocalyptic number.

38391240506 is a deficient number, since it is larger than the sum of its proper divisors (19308759034).

38391240506 is a wasteful number, since it uses less digits than its factorization.

38391240506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37712928.

The product of its (nonzero) digits is 155520, while the sum is 41.

Adding to 38391240506 its reverse (60504219383), we get a palindrome (98895459889).

The spelling of 38391240506 in words is "thirty-eight billion, three hundred ninety-one million, two hundred forty thousand, five hundred six".