52028730 has 144 divisors (see below), whose sum is σ = 153755784. Its totient is φ = 12597120.

The previous prime is 52028723. The next prime is 52028731. The reversal of 52028730 is 3782025.

It can be written as a sum of positive squares in 4 ways, for example, as 17065161 + 34963569 = 4131^2 + 5913^2 .

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

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 52028694 and 52028703.

It is not an unprimeable number, because it can be changed into a prime (52028731) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 852900 + ... + 852960.

Almost surely, 2^52028730 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 52028730, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (76877892).

52028730 is an abundant number, since it is smaller than the sum of its proper divisors (101727054).

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

52028730 is an equidigital number, since it uses as much as digits as its factorization.

52028730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105 (or 84 counting only the distinct ones).

The product of its (nonzero) digits is 3360, while the sum is 27.

The square root of 52028730 is about 7213.0943429294. The cubic root of 52028730 is about 373.3198434397.

The spelling of 52028730 in words is "fifty-two million, twenty-eight thousand, seven hundred thirty".