38406943 has 4 divisors (see below), whose sum is σ = 39224160. Its totient is φ = 37589728.

The previous prime is 38406937. The next prime is 38406947. The reversal of 38406943 is 34960483.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 38406943 - 2⁵ = 38406911 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38406947) 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, 408538 + ... + 408631.

It is an arithmetic number, because the mean of its divisors is an integer number (9806040).

Almost surely, 2^38406943 is an apocalyptic number.

38406943 is a deficient number, since it is larger than the sum of its proper divisors (817217).

38406943 is an equidigital number, since it uses as much as digits as its factorization.

38406943 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 817216.

The product of its (nonzero) digits is 62208, while the sum is 37.

The square root of 38406943 is about 6197.3335395152. Note that the first 3 decimals coincide. The cubic root of 38406943 is about 337.3933980655.

The spelling of 38406943 in words is "thirty-eight million, four hundred six thousand, nine hundred forty-three".