7725528 has 48 divisors (see below), whose sum is σ = 21278400. Its totient is φ = 2531520.

The previous prime is 7725527. The next prime is 7725559. The reversal of 7725528 is 8255277.

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 = 7725492 and 7725501.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7725521) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 3513 + ... + 5271.

It is an arithmetic number, because the mean of its divisors is an integer number (443300).

Almost surely, 2^7725528 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 7725528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (10639200).

7725528 is an abundant number, since it is smaller than the sum of its proper divisors (13552872).

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

7725528 is a wasteful number, since it uses less digits than its factorization.

7725528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1832 (or 1825 counting only the distinct ones).

The product of its digits is 39200, while the sum is 36.

The square root of 7725528 is about 2779.4834052392. The cubic root of 7725528 is about 197.6860651056.

The spelling of 7725528 in words is "seven million, seven hundred twenty-five thousand, five hundred twenty-eight".