33864636 has 24 divisors (see below), whose sum is σ = 85096144. Its totient is φ = 10419840.

The previous prime is 33864613. The next prime is 33864637. The reversal of 33864636 is 63646833.

33864636 = 650² + 651² + ... + 721².

33864636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×33864636² = 2293627142824992, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is a junction number, because it is equal to n+sod(n) for n = 33864594 and 33864603.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (33864637) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108385 + ... + 108696.

Almost surely, 2^33864636 is an apocalyptic number.

It is an amenable number.

33864636 is an abundant number, since it is smaller than the sum of its proper divisors (51231508).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

33864636 is a wasteful number, since it uses less digits than its factorization.

33864636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 217101 (or 217099 counting only the distinct ones).

The product of its digits is 186624, while the sum is 39.

The square root of 33864636 is about 5819.3329514645. The cubic root of 33864636 is about 323.5306800586.

The spelling of 33864636 in words is "thirty-three million, eight hundred sixty-four thousand, six hundred thirty-six".