36000781 has 8 divisors (see below), whose sum is σ = 38341944. Its totient is φ = 33684480.

The previous prime is 36000779. The next prime is 36000787. The reversal of 36000781 is 18700063.

It can be written as a sum of positive squares in 4 ways, for example, as 13286025 + 22714756 = 3645^2 + 4766^2 .

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

It is not a de Polignac number, because 36000781 - 2¹ = 36000779 is a prime.

It is a super-2 number, since 2×36000781² = 2592112465219922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36000787) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3180 + ... + 9061.

It is an arithmetic number, because the mean of its divisors is an integer number (4792743).

Almost surely, 2^36000781 is an apocalyptic number.

It is an amenable number.

36000781 is a deficient number, since it is larger than the sum of its proper divisors (2341163).

36000781 is a wasteful number, since it uses less digits than its factorization.

36000781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12431.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 36000781 is about 6000.0650829804. The cubic root of 36000781 is about 330.1951126548.

The spelling of 36000781 in words is "thirty-six million, seven hundred eighty-one", and thus it is an aban number.