28528528 has 40 divisors (see below), whose sum is σ = 63809408. Its totient is φ = 12102912.

The previous prime is 28528501. The next prime is 28528529. The reversal of 28528528 is 82582582.

It is a super-3 number, since 3×28528528³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28528529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is an upside-down number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10300 + ... + 12772.

Almost surely, 2^28528528 is an apocalyptic number.

28528528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28528528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31904704).

28528528 is an abundant number, since it is smaller than the sum of its proper divisors (35280880).

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

28528528 is a wasteful number, since it uses less digits than its factorization.

28528528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2591 (or 2585 counting only the distinct ones).

The product of its digits is 102400, while the sum is 40.

The square root of 28528528 is about 5341.2103497241. The cubic root of 28528528 is about 305.5576218385.

The spelling of 28528528 in words is "twenty-eight million, five hundred twenty-eight thousand, five hundred twenty-eight".