53005644 has 48 divisors (see below), whose sum is σ = 138311040. Its totient is φ = 17554320.

The previous prime is 53005621. The next prime is 53005651. The reversal of 53005644 is 44650035.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 16099 + ... + 19109.

It is an arithmetic number, because the mean of its divisors is an integer number (2881480).

Almost surely, 2^53005644 is an apocalyptic number.

53005644 is a gapful number since it is divisible by the number (54) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 53005644, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69155520).

53005644 is an abundant number, since it is smaller than the sum of its proper divisors (85305396).

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

53005644 is a wasteful number, since it uses less digits than its factorization.

53005644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3187 (or 3179 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 53005644 is about 7280.4975104728. The cubic root of 53005644 is about 375.6419085820.

Adding to 53005644 its reverse (44650035), we get a palindrome (97655679).

The spelling of 53005644 in words is "fifty-three million, five thousand, six hundred forty-four".