36642861 has 20 divisors (see below), whose sum is σ = 55496892. Its totient is φ = 24090048.

The previous prime is 36642847. The next prime is 36642917. The reversal of 36642861 is 16824663.

36642861 is a `hidden beast` number, since 3 + 6 + 642 + 8 + 6 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 17589636 + 19053225 = 4194^2 + 4365^2 .

It is not a de Polignac number, because 36642861 - 2⁵ = 36642829 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (36643861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2815 + ... + 9011.

Almost surely, 2^36642861 is an apocalyptic number.

It is an amenable number.

36642861 is a deficient number, since it is larger than the sum of its proper divisors (18854031).

36642861 is an equidigital number, since it uses as much as digits as its factorization.

36642861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6282 (or 6273 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 36642861 is about 6053.3347008075. The cubic root of 36642861 is about 332.1465851224.

The spelling of 36642861 in words is "thirty-six million, six hundred forty-two thousand, eight hundred sixty-one".