38993894 has 4 divisors (see below), whose sum is σ = 58490844. Its totient is φ = 19496946.

The previous prime is 38993887. The next prime is 38993917. The reversal of 38993894 is 49839983.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49839983 = 19 ⋅2623157.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9748472 + ... + 9748475.

It is an arithmetic number, because the mean of its divisors is an integer number (14622711).

Almost surely, 2^38993894 is an apocalyptic number.

38993894 is a deficient number, since it is larger than the sum of its proper divisors (19496950).

38993894 is a wasteful number, since it uses less digits than its factorization.

38993894 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19496949.

The product of its digits is 1679616, while the sum is 53.

The square root of 38993894 is about 6244.5091080084. The cubic root of 38993894 is about 339.1034453118.

The spelling of 38993894 in words is "thirty-eight million, nine hundred ninety-three thousand, eight hundred ninety-four".