38131618 has 8 divisors (see below), whose sum is σ = 65368512. Its totient is φ = 16342116.

The previous prime is 38131609. The next prime is 38131619. The reversal of 38131618 is 81613183.

38131618 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 self number, because there is not a number n which added to its sum of digits gives 38131618.

It is not an unprimeable number, because it can be changed into a prime (38131619) 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 3 ways as a sum of consecutive naturals, for example, 1361830 + ... + 1361857.

It is an arithmetic number, because the mean of its divisors is an integer number (8171064).

Almost surely, 2^38131618 is an apocalyptic number.

38131618 is a deficient number, since it is larger than the sum of its proper divisors (27236894).

38131618 is a wasteful number, since it uses less digits than its factorization.

38131618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2723696.

The product of its digits is 3456, while the sum is 31.

The square root of 38131618 is about 6175.0804043348. The cubic root of 38131618 is about 336.5852482047.

The spelling of 38131618 in words is "thirty-eight million, one hundred thirty-one thousand, six hundred eighteen".