36328581 has 20 divisors (see below), whose sum is σ = 54523084. Its totient is φ = 24105600.

The previous prime is 36328577. The next prime is 36328597. The reversal of 36328581 is 18582363.

It can be written as a sum of positive squares in 2 ways, for example, as 9641025 + 26687556 = 3105^2 + 5166^2 .

It is not a de Polignac number, because 36328581 - 2² = 36328577 is a prime.

It is a super-2 number, since 2×36328581² = 2639531594947122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a zygodrome in base 5.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36328531) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 18591 + ... + 20451.

Almost surely, 2^36328581 is an apocalyptic number.

It is an amenable number.

36328581 is a deficient number, since it is larger than the sum of its proper divisors (18194503).

36328581 is a wasteful number, since it uses less digits than its factorization.

36328581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2114 (or 2105 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 36328581 is about 6027.3195534997. The cubic root of 36328581 is about 331.1942677804.

The spelling of 36328581 in words is "thirty-six million, three hundred twenty-eight thousand, five hundred eighty-one".