36658381 has 4 divisors (see below), whose sum is σ = 36671292. Its totient is φ = 36645472.

The previous prime is 36658357. The next prime is 36658397. The reversal of 36658381 is 18385663.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 16273156 + 20385225 = 4034^2 + 4515^2 .

It is a cyclic number.

It is not a de Polignac number, because 36658381 - 2⁹ = 36657869 is a prime.

It is a super-2 number, since 2×36658381² = 2687673795082322, which contains 22 as substring.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36658981) 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, 130 + ... + 8563.

It is an arithmetic number, because the mean of its divisors is an integer number (9167823).

Almost surely, 2^36658381 is an apocalyptic number.

It is an amenable number.

36658381 is a deficient number, since it is larger than the sum of its proper divisors (12911).

36658381 is an equidigital number, since it uses as much as digits as its factorization.

36658381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12910.

The product of its digits is 103680, while the sum is 40.

The square root of 36658381 is about 6054.6165031321. The cubic root of 36658381 is about 332.1934718124.

The spelling of 36658381 in words is "thirty-six million, six hundred fifty-eight thousand, three hundred eighty-one".