38990923 has 4 divisors (see below), whose sum is σ = 39011128. Its totient is φ = 38970720.

The previous prime is 38990909. The next prime is 38990951. The reversal of 38990923 is 32909983.

It is a happy number.

38990923 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 cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-38990923 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 38990923.

It is not an unprimeable number, because it can be changed into a prime (38990953) 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, 6861 + ... + 11182.

It is an arithmetic number, because the mean of its divisors is an integer number (9752782).

Almost surely, 2^38990923 is an apocalyptic number.

38990923 is a deficient number, since it is larger than the sum of its proper divisors (20205).

38990923 is a wasteful number, since it uses less digits than its factorization.

38990923 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20204.

The product of its (nonzero) digits is 104976, while the sum is 43.

The square root of 38990923 is about 6244.2712144813. The cubic root of 38990923 is about 339.0948328359.

The spelling of 38990923 in words is "thirty-eight million, nine hundred ninety thousand, nine hundred twenty-three".