38842581 has 4 divisors (see below), whose sum is σ = 51790112. Its totient is φ = 25895052.

The previous prime is 38842567. The next prime is 38842613. The reversal of 38842581 is 18524883.

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.

It is not a de Polignac number, because 38842581 - 2⁵ = 38842549 is a prime.

It is a super-2 number, since 2×38842581² = 3017492197483122, 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 (38842511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6473761 + ... + 6473766.

It is an arithmetic number, because the mean of its divisors is an integer number (12947528).

Almost surely, 2^38842581 is an apocalyptic number.

It is an amenable number.

38842581 is a deficient number, since it is larger than the sum of its proper divisors (12947531).

38842581 is a wasteful number, since it uses less digits than its factorization.

38842581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12947530.

The product of its digits is 61440, while the sum is 39.

The square root of 38842581 is about 6232.3816474924. The cubic root of 38842581 is about 338.6642545648.

The spelling of 38842581 in words is "thirty-eight million, eight hundred forty-two thousand, five hundred eighty-one".