3636440 has 16 divisors (see below), whose sum is σ = 8182080. Its totient is φ = 1454560.

The previous prime is 3636439. The next prime is 3636443. The reversal of 3636440 is 446363.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3636443) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 45416 + ... + 45495.

It is an arithmetic number, because the mean of its divisors is an integer number (511380).

Almost surely, 2^3636440 is an apocalyptic number.

It is an amenable number.

3636440 is an abundant number, since it is smaller than the sum of its proper divisors (4545640).

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

3636440 is a wasteful number, since it uses less digits than its factorization.

3636440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 90922 (or 90918 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 26.

The square root of 3636440 is about 1906.9452011004. The cubic root of 3636440 is about 153.7772683915. Note that the first 3 decimals are identical.

The spelling of 3636440 in words is "three million, six hundred thirty-six thousand, four hundred forty".