36002781 has 6 divisors (see below), whose sum is σ = 52004030. Its totient is φ = 24001848.

The previous prime is 36002767. The next prime is 36002783. The reversal of 36002781 is 18720063.

It can be written as a sum of positive squares in only one way, i.e., 29877156 + 6125625 = 5466^2 + 2475^2 .

It is not a de Polignac number, because 36002781 - 2⁹ = 36002269 is a prime.

It is a super-2 number, since 2×36002781² = 2592400479467922, which contains 22 as substring.

It is a Duffinian number.

It is a plaindrome in base 16.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36002783) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2000146 + ... + 2000163.

Almost surely, 2^36002781 is an apocalyptic number.

It is an amenable number.

36002781 is a deficient number, since it is larger than the sum of its proper divisors (16001249).

36002781 is a wasteful number, since it uses less digits than its factorization.

36002781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4000315 (or 4000312 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 36002781 is about 6000.2317455245. The cubic root of 36002781 is about 330.2012271332.

The spelling of 36002781 in words is "thirty-six million, two thousand, seven hundred eighty-one".