36663440 has 80 divisors (see below), whose sum is σ = 94654656. Its totient is φ = 13094400.

The previous prime is 36663377. The next prime is 36663463. The reversal of 36663440 is 4436663.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 36663397 and 36663406.

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 53339 + ... + 54021.

Almost surely, 2^36663440 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 36663440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (47327328).

36663440 is an abundant number, since it is smaller than the sum of its proper divisors (57991216).

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

36663440 is a wasteful number, since it uses less digits than its factorization.

36663440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 768 (or 762 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 32.

The square root of 36663440 is about 6055.0342691020. The cubic root of 36663440 is about 332.2087524424.

The spelling of 36663440 in words is "thirty-six million, six hundred sixty-three thousand, four hundred forty".