53306720 has 48 divisors (see below), whose sum is σ = 126454608. Its totient is φ = 21235200.

The previous prime is 53306719. The next prime is 53306753. The reversal of 53306720 is 2760335.

It is a self number, because there is not a number n which added to its sum of digits gives 53306720.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50195 + ... + 51245.

It is an arithmetic number, because the mean of its divisors is an integer number (2634471).

Almost surely, 2^53306720 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 53306720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63227304).

53306720 is an abundant number, since it is smaller than the sum of its proper divisors (73147888).

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

53306720 is a wasteful number, since it uses less digits than its factorization.

53306720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1383 (or 1375 counting only the distinct ones).

The product of its (nonzero) digits is 3780, while the sum is 26.

The square root of 53306720 is about 7301.1451156651. The cubic root of 53306720 is about 376.3517908716.

The spelling of 53306720 in words is "fifty-three million, three hundred six thousand, seven hundred twenty".