53644680 has 96 divisors (see below), whose sum is σ = 180835200. Its totient is φ = 14302656.

The previous prime is 53644667. The next prime is 53644691. The reversal of 53644680 is 8644635.

53644680 is a `hidden beast` number, since 5 + 3 + 644 + 6 + 8 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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 23 ways as a sum of consecutive naturals, for example, 6961 + ... + 12479.

It is an arithmetic number, because the mean of its divisors is an integer number (1883700).

Almost surely, 2^53644680 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 53644680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (90417600).

53644680 is an abundant number, since it is smaller than the sum of its proper divisors (127190520).

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

53644680 is a wasteful number, since it uses less digits than its factorization.

53644680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5545 (or 5529 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 36.

The square root of 53644680 is about 7324.2528629206. The cubic root of 53644680 is about 377.1454619064.

The spelling of 53644680 in words is "fifty-three million, six hundred forty-four thousand, six hundred eighty".