36638261 has 8 divisors (see below), whose sum is σ = 40021248. Its totient is φ = 33264000.

The previous prime is 36638243. The next prime is 36638263. The reversal of 36638261 is 16283663.

36638261 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 36638261 - 2¹⁴ = 36621877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36638263) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 9221 + ... + 12581.

It is an arithmetic number, because the mean of its divisors is an integer number (5002656).

Almost surely, 2^36638261 is an apocalyptic number.

It is an amenable number.

36638261 is a deficient number, since it is larger than the sum of its proper divisors (3382987).

36638261 is a wasteful number, since it uses less digits than its factorization.

36638261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4363.

The product of its digits is 31104, while the sum is 35.

The square root of 36638261 is about 6052.9547330209. The cubic root of 36638261 is about 332.1326857508.

The spelling of 36638261 in words is "thirty-six million, six hundred thirty-eight thousand, two hundred sixty-one".