36390281 has 4 divisors (see below), whose sum is σ = 36888852. Its totient is φ = 35891712.

The previous prime is 36390241. The next prime is 36390293. The reversal of 36390281 is 18209363.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18209363 = 17 ⋅1071139.

It can be written as a sum of positive squares in 2 ways, for example, as 17977600 + 18412681 = 4240^2 + 4291^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36390281 is a prime.

It is a super-2 number, since 2×36390281² = 2648505102517922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (36390241) 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, 249176 + ... + 249321.

It is an arithmetic number, because the mean of its divisors is an integer number (9222213).

Almost surely, 2^36390281 is an apocalyptic number.

It is an amenable number.

36390281 is a deficient number, since it is larger than the sum of its proper divisors (498571).

36390281 is an equidigital number, since it uses as much as digits as its factorization.

36390281 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 498570.

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 36390281 is about 6032.4357435451. The cubic root of 36390281 is about 331.3816604429.

The spelling of 36390281 in words is "thirty-six million, three hundred ninety thousand, two hundred eighty-one".