28524340 has 48 divisors (see below), whose sum is σ = 66608640. Its totient is φ = 10189440.

The previous prime is 28524323. The next prime is 28524367. The reversal of 28524340 is 4342582.

28524340 = 208² + 209² + ... + 455².

It is a junction number, because it is equal to n+sod(n) for n = 28524299 and 28524308.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6291 + ... + 9829.

It is an arithmetic number, because the mean of its divisors is an integer number (1387680).

Almost surely, 2^28524340 is an apocalyptic number.

28524340 is a gapful number since it is divisible by the number (20) 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 28524340, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (33304320).

28524340 is an abundant number, since it is smaller than the sum of its proper divisors (38084300).

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

28524340 is a wasteful number, since it uses less digits than its factorization.

28524340 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3592 (or 3590 counting only the distinct ones).

The product of its (nonzero) digits is 7680, while the sum is 28.

The square root of 28524340 is about 5340.8182893635. The cubic root of 28524340 is about 305.5426691107.

The spelling of 28524340 in words is "twenty-eight million, five hundred twenty-four thousand, three hundred forty".