38817481 has 4 divisors (see below), whose sum is σ = 38871172. Its totient is φ = 38763792.

The previous prime is 38817473. The next prime is 38817497. The reversal of 38817481 is 18471883.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18471883 = 307 ⋅60169.

It can be written as a sum of positive squares in 2 ways, for example, as 18567481 + 20250000 = 4309^2 + 4500^2 .

It is a cyclic number.

It is not a de Polignac number, because 38817481 - 2³ = 38817473 is a prime.

It is a super-2 number, since 2×38817481² = 3013593662370722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (38817461) 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, 25746 + ... + 27211.

It is an arithmetic number, because the mean of its divisors is an integer number (9717793).

Almost surely, 2^38817481 is an apocalyptic number.

It is an amenable number.

38817481 is a deficient number, since it is larger than the sum of its proper divisors (53691).

38817481 is an equidigital number, since it uses as much as digits as its factorization.

38817481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53690.

The product of its digits is 43008, while the sum is 40.

The square root of 38817481 is about 6230.3676456530. The cubic root of 38817481 is about 338.5912907862.

The spelling of 38817481 in words is "thirty-eight million, eight hundred seventeen thousand, four hundred eighty-one".