53300720 has 80 divisors (see below), whose sum is σ = 138928608. Its totient is φ = 18846720.

The previous prime is 53300713. The next prime is 53300743. The reversal of 53300720 is 2700335.

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

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 53300692 and 53300701.

It is a congruent number.

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, 31742 + ... + 33378.

Almost surely, 2^53300720 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 53300720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (69464304).

53300720 is an abundant number, since it is smaller than the sum of its proper divisors (85627888).

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

53300720 is a wasteful number, since it uses less digits than its factorization.

53300720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1698 (or 1692 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 53300720 is about 7300.7342096532. The cubic root of 53300720 is about 376.3376701036.

The spelling of 53300720 in words is "fifty-three million, three hundred thousand, seven hundred twenty".