53720928 has 96 divisors (see below), whose sum is σ = 158548320. Its totient is φ = 17694720.

The previous prime is 53720921. The next prime is 53720957. The reversal of 53720928 is 82902735.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (96).

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

It is a junction number, because it is equal to n+sod(n) for n = 53720892 and 53720901.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53720921) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83488 + ... + 84128.

It is an arithmetic number, because the mean of its divisors is an integer number (1651545).

Almost surely, 2^53720928 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 53720928, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79274160).

53720928 is an abundant number, since it is smaller than the sum of its proper divisors (104827392).

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

53720928 is a wasteful number, since it uses less digits than its factorization.

53720928 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 757 (or 743 counting only the distinct ones).

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

The square root of 53720928 is about 7329.4561871942. The cubic root of 53720928 is about 377.3240628632.

The spelling of 53720928 in words is "fifty-three million, seven hundred twenty thousand, nine hundred twenty-eight".