36530391 has 4 divisors (see below), whose sum is σ = 48707192. Its totient is φ = 24353592.

The previous prime is 36530363. The next prime is 36530393. The reversal of 36530391 is 19303563.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 36530391 - 2¹⁸ = 36268247 is a prime.

It is a super-2 number, since 2×36530391² = 2668938933225762, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36530393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6088396 + ... + 6088401.

It is an arithmetic number, because the mean of its divisors is an integer number (12176798).

Almost surely, 2^36530391 is an apocalyptic number.

36530391 is a deficient number, since it is larger than the sum of its proper divisors (12176801).

36530391 is a wasteful number, since it uses less digits than its factorization.

36530391 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12176800.

The product of its (nonzero) digits is 7290, while the sum is 30.

The square root of 36530391 is about 6044.0376405181. The cubic root of 36530391 is about 331.8064114307.

The spelling of 36530391 in words is "thirty-six million, five hundred thirty thousand, three hundred ninety-one".