38503681 has 4 divisors (see below), whose sum is σ = 38583232. Its totient is φ = 38424132.

The previous prime is 38503667. The next prime is 38503711. The reversal of 38503681 is 18630583.

It is a happy number.

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: 18630583 = 19 ⋅980557.

It is a cyclic number.

It is not a de Polignac number, because 38503681 - 2¹¹ = 38501633 is a prime.

It is a super-2 number, since 2×38503681² = 2965066901099522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38503781) 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, 39045 + ... + 40018.

It is an arithmetic number, because the mean of its divisors is an integer number (9645808).

Almost surely, 2^38503681 is an apocalyptic number.

It is an amenable number.

38503681 is a deficient number, since it is larger than the sum of its proper divisors (79551).

38503681 is an equidigital number, since it uses as much as digits as its factorization.

38503681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 79550.

The product of its (nonzero) digits is 17280, while the sum is 34.

The square root of 38503681 is about 6205.1334393388. The cubic root of 38503681 is about 337.6764319405.

The spelling of 38503681 in words is "thirty-eight million, five hundred three thousand, six hundred eighty-one".