38944393 has 4 divisors (see below), whose sum is σ = 39437440. Its totient is φ = 38451348.

The previous prime is 38944391. The next prime is 38944397. The reversal of 38944393 is 39344983.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39344983 = 31 ⋅1269193.

It is a cyclic number.

It is not a de Polignac number, because 38944393 - 2¹ = 38944391 is a prime.

It is a super-2 number, since 2×38944393² = 3033331492276898, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38944391) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 246405 + ... + 246562.

It is an arithmetic number, because the mean of its divisors is an integer number (9859360).

Almost surely, 2^38944393 is an apocalyptic number.

It is an amenable number.

38944393 is a deficient number, since it is larger than the sum of its proper divisors (493047).

38944393 is an equidigital number, since it uses as much as digits as its factorization.

38944393 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 493046.

The product of its digits is 279936, while the sum is 43.

The square root of 38944393 is about 6240.5442871596. The cubic root of 38944393 is about 338.9598923437.

The spelling of 38944393 in words is "thirty-eight million, nine hundred forty-four thousand, three hundred ninety-three".