38743281 has 12 divisors (see below), whose sum is σ = 56061252. Its totient is φ = 25783296.

The previous prime is 38743279. The next prime is 38743283. The reversal of 38743281 is 18234783.

It is an interprime number because it is at equal distance from previous prime (38743279) and next prime (38743283).

It can be written as a sum of positive squares in 2 ways, for example, as 3744225 + 34999056 = 1935^2 + 5916^2 .

It is not a de Polignac number, because 38743281 - 2¹ = 38743279 is a prime.

It is a super-2 number, since 2×38743281² = 3002083645289922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (38743283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2065 + ... + 9041.

It is an arithmetic number, because the mean of its divisors is an integer number (4671771).

Almost surely, 2^38743281 is an apocalyptic number.

It is an amenable number.

38743281 is a deficient number, since it is larger than the sum of its proper divisors (17317971).

38743281 is a wasteful number, since it uses less digits than its factorization.

38743281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600 (or 7597 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 38743281 is about 6224.4100925309. The cubic root of 38743281 is about 338.3754129731.

The spelling of 38743281 in words is "thirty-eight million, seven hundred forty-three thousand, two hundred eighty-one".