38575981 has 4 divisors (see below), whose sum is σ = 38631100. Its totient is φ = 38520864.

The previous prime is 38575967. The next prime is 38576063. The reversal of 38575981 is 18957583.

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

It can be written as a sum of positive squares in 2 ways, for example, as 5616900 + 32959081 = 2370^2 + 5741^2 .

It is a cyclic number.

It is not a de Polignac number, because 38575981 - 2⁹ = 38575469 is a prime.

It is a super-2 number, since 2×38575981² = 2976212620224722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38575931) 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, 26496 + ... + 27913.

It is an arithmetic number, because the mean of its divisors is an integer number (9657775).

Almost surely, 2^38575981 is an apocalyptic number.

It is an amenable number.

38575981 is a deficient number, since it is larger than the sum of its proper divisors (55119).

38575981 is an equidigital number, since it uses as much as digits as its factorization.

38575981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55118.

The product of its digits is 302400, while the sum is 46.

The square root of 38575981 is about 6210.9565285872. The cubic root of 38575981 is about 337.8876562550.

The spelling of 38575981 in words is "thirty-eight million, five hundred seventy-five thousand, nine hundred eighty-one".