36632781 has 6 divisors (see below), whose sum is σ = 52914030. Its totient is φ = 24421848.

The previous prime is 36632777. The next prime is 36632809. The reversal of 36632781 is 18723663.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 32592681 + 4040100 = 5709^2 + 2010^2 .

It is not a de Polignac number, because 36632781 - 2² = 36632777 is a prime.

It is a super-2 number, since 2×36632781² = 2683921287587922, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36633781) 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, 2035146 + ... + 2035163.

It is an arithmetic number, because the mean of its divisors is an integer number (8819005).

Almost surely, 2^36632781 is an apocalyptic number.

It is an amenable number.

36632781 is a deficient number, since it is larger than the sum of its proper divisors (16281249).

36632781 is a wasteful number, since it uses less digits than its factorization.

36632781 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4070315 (or 4070312 counting only the distinct ones).

The product of its digits is 36288, while the sum is 36.

The square root of 36632781 is about 6052.5020446093. The cubic root of 36632781 is about 332.1161258503.

The spelling of 36632781 in words is "thirty-six million, six hundred thirty-two thousand, seven hundred eighty-one".