38805281 has 2 divisors, whose sum is σ = 38805282. Its totient is φ = 38805280.

The previous prime is 38805223. The next prime is 38805287. The reversal of 38805281 is 18250883.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34869025 + 3936256 = 5905^2 + 1984^2 .

It is a cyclic number.

It is not a de Polignac number, because 38805281 - 2¹⁰ = 38804257 is a prime.

It is a super-2 number, since 2×38805281² = 3011699666977922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (38805287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19402640 + 19402641.

It is an arithmetic number, because the mean of its divisors is an integer number (19402641).

Almost surely, 2^38805281 is an apocalyptic number.

It is an amenable number.

38805281 is a deficient number, since it is larger than the sum of its proper divisors (1).

38805281 is an equidigital number, since it uses as much as digits as its factorization.

38805281 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 38805281 is about 6229.3884932632. The cubic root of 38805281 is about 338.5558149604. Note that the first 3 decimals are identical.

The spelling of 38805281 in words is "thirty-eight million, eight hundred five thousand, two hundred eighty-one".