38087281 has 2 divisors, whose sum is σ = 38087282. Its totient is φ = 38087280.

The previous prime is 38087263. The next prime is 38087297. The reversal of 38087281 is 18278083.

It is the 2520-th star number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 36240400 + 1846881 = 6020^2 + 1359^2 .

It is a cyclic number.

It is not a de Polignac number, because 38087281 - 2¹³ = 38079089 is a prime.

It is a super-2 number, since 2×38087281² = 2901281947945922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 38087281.

It is not a weakly prime, because it can be changed into another prime (38087221) 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 as a sum of consecutive naturals, namely, 19043640 + 19043641.

It is an arithmetic number, because the mean of its divisors is an integer number (19043641).

Almost surely, 2^38087281 is an apocalyptic number.

It is an amenable number.

38087281 is a deficient number, since it is larger than the sum of its proper divisors (1).

38087281 is an equidigital number, since it uses as much as digits as its factorization.

38087281 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21504, while the sum is 37.

The square root of 38087281 is about 6171.4893664334. The cubic root of 38087281 is about 336.4547443641.

The spelling of 38087281 in words is "thirty-eight million, eighty-seven thousand, two hundred eighty-one".