53289720 has 96 divisors (see below), whose sum is σ = 188950320. Its totient is φ = 12917760.

The previous prime is 53289697. The next prime is 53289739. The reversal of 53289720 is 2798235.

It is a happy number.

53289720 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 (13) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2769 + ... + 10688.

Almost surely, 2^53289720 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 53289720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94475160).

53289720 is an abundant number, since it is smaller than the sum of its proper divisors (135660600).

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

53289720 is a wasteful number, since it uses less digits than its factorization.

53289720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13485 (or 13478 counting only the distinct ones).

The product of its (nonzero) digits is 30240, while the sum is 36.

The square root of 53289720 is about 7299.9808218926. The cubic root of 53289720 is about 376.3117792765.

The spelling of 53289720 in words is "fifty-three million, two hundred eighty-nine thousand, seven hundred twenty".