28585280 has 28 divisors (see below), whose sum is σ = 68069460. Its totient is φ = 11433984.

The previous prime is 28585261. The next prime is 28585303. The reversal of 28585280 is 8258582.

It can be written as a sum of positive squares in 2 ways, for example, as 18800896 + 9784384 = 4336^2 + 3128^2 .

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44345 + ... + 44984.

Almost surely, 2^28585280 is an apocalyptic number.

28585280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28585280 is an abundant number, since it is smaller than the sum of its proper divisors (39484180).

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

28585280 is an equidigital number, since it uses as much as digits as its factorization.

28585280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89346 (or 89336 counting only the distinct ones).

The product of its (nonzero) digits is 51200, while the sum is 38.

The square root of 28585280 is about 5346.5203637506. The cubic root of 28585280 is about 305.7601036021.

The spelling of 28585280 in words is "twenty-eight million, five hundred eighty-five thousand, two hundred eighty".