36381985 has 4 divisors (see below), whose sum is σ = 43658388. Its totient is φ = 29105584.

The previous prime is 36381907. The next prime is 36381991. The reversal of 36381985 is 58918363.

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

It can be written as a sum of positive squares in 2 ways, for example, as 23658496 + 12723489 = 4864^2 + 3567^2 .

It is a cyclic number.

It is not a de Polignac number, because 36381985 - 2¹³ = 36373793 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3638194 + ... + 3638203.

It is an arithmetic number, because the mean of its divisors is an integer number (10914597).

Almost surely, 2^36381985 is an apocalyptic number.

It is an amenable number.

36381985 is a deficient number, since it is larger than the sum of its proper divisors (7276403).

36381985 is an equidigital number, since it uses as much as digits as its factorization.

36381985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7276402.

The product of its digits is 155520, while the sum is 43.

The square root of 36381985 is about 6031.7480882411. The cubic root of 36381985 is about 331.3564765100.

The spelling of 36381985 in words is "thirty-six million, three hundred eighty-one thousand, nine hundred eighty-five".