28569504 has 48 divisors (see below), whose sum is σ = 75569760. Its totient is φ = 9450240.

The previous prime is 28569493. The next prime is 28569517. The reversal of 28569504 is 40596582.

It is a tau number, because it is divible by the number of its divisors (48).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12274 + ... + 14414.

It is an arithmetic number, because the mean of its divisors is an integer number (1574370).

Almost surely, 2^28569504 is an apocalyptic number.

28569504 is a gapful number since it is divisible by the number (24) 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 28569504, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (37784880).

28569504 is an abundant number, since it is smaller than the sum of its proper divisors (47000256).

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

28569504 is a wasteful number, since it uses less digits than its factorization.

28569504 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2293 (or 2285 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 39.

The square root of 28569504 is about 5345.0448080442. The cubic root of 28569504 is about 305.7038443543.

The spelling of 28569504 in words is "twenty-eight million, five hundred sixty-nine thousand, five hundred four".