36881381 has 8 divisors (see below), whose sum is σ = 39112920. Its totient is φ = 34656768.

The previous prime is 36881363. The next prime is 36881389. The reversal of 36881381 is 18318863.

36881381 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 22372900 + 14508481 = 4730^2 + 3809^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-36881381 is a prime.

It is a super-2 number, since 2×36881381² = 2720472528934322, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36881389) 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, 12785 + ... + 15401.

It is an arithmetic number, because the mean of its divisors is an integer number (4889115).

Almost surely, 2^36881381 is an apocalyptic number.

It is an amenable number.

36881381 is a deficient number, since it is larger than the sum of its proper divisors (2231539).

36881381 is a wasteful number, since it uses less digits than its factorization.

36881381 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3463.

The product of its digits is 27648, while the sum is 38.

The square root of 36881381 is about 6073.0042812433. The cubic root of 36881381 is about 332.8657095129.

The spelling of 36881381 in words is "thirty-six million, eight hundred eighty-one thousand, three hundred eighty-one".