36806781 has 32 divisors (see below), whose sum is σ = 57600000. Its totient is φ = 20666880.

The previous prime is 36806779. The next prime is 36806789. The reversal of 36806781 is 18760863.

It is not a de Polignac number, because 36806781 - 2¹ = 36806779 is a prime.

It is a super-2 number, since 2×36806781² = 2709478255163922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36806789) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 28845 + ... + 30093.

It is an arithmetic number, because the mean of its divisors is an integer number (1800000).

Almost surely, 2^36806781 is an apocalyptic number.

It is an amenable number.

36806781 is a deficient number, since it is larger than the sum of its proper divisors (20793219).

36806781 is a wasteful number, since it uses less digits than its factorization.

36806781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1329.

The product of its (nonzero) digits is 48384, while the sum is 39.

The square root of 36806781 is about 6066.8592368704. The cubic root of 36806781 is about 332.6411287758.

The spelling of 36806781 in words is "thirty-six million, eight hundred six thousand, seven hundred eighty-one".