38078281 has 2 divisors, whose sum is σ = 38078282. Its totient is φ = 38078280.

The previous prime is 38078279. The next prime is 38078329. The reversal of 38078281 is 18287083.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32672656 + 5405625 = 5716^2 + 2325^2 .

It is a cyclic number.

It is not a de Polignac number, because 38078281 - 2¹ = 38078279 is a prime.

It is a super-2 number, since 2×38078281² = 2899910967829922, which contains 22 as substring.

Together with 38078279, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 38078281.

It is not a weakly prime, because it can be changed into another prime (38078231) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19039140 + 19039141.

It is an arithmetic number, because the mean of its divisors is an integer number (19039141).

Almost surely, 2^38078281 is an apocalyptic number.

It is an amenable number.

38078281 is a deficient number, since it is larger than the sum of its proper divisors (1).

38078281 is an equidigital number, since it uses as much as digits as its factorization.

38078281 is an evil number, because the sum of its binary digits is even.

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

The square root of 38078281 is about 6170.7601638696. The cubic root of 38078281 is about 336.4282409298.

The spelling of 38078281 in words is "thirty-eight million, seventy-eight thousand, two hundred eighty-one".