28480580 has 24 divisors (see below), whose sum is σ = 59958360. Its totient is φ = 11363840.

The previous prime is 28480567. The next prime is 28480589. The reversal of 28480580 is 8508482.

It can be written as a sum of positive squares in 4 ways, for example, as 6031936 + 22448644 = 2456^2 + 4738^2 .

It is a super-3 number, since 3×28480580³ (a number of 23 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a self number, because there is not a number n which added to its sum of digits gives 28480580.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28480589) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7676 + ... + 10764.

It is an arithmetic number, because the mean of its divisors is an integer number (2498265).

Almost surely, 2^28480580 is an apocalyptic number.

28480580 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28480580 is an abundant number, since it is smaller than the sum of its proper divisors (31477780).

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

28480580 is a wasteful number, since it uses less digits than its factorization.

28480580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3559 (or 3557 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The square root of 28480580 is about 5336.7199664213. The cubic root of 28480580 is about 305.3863419130.

The spelling of 28480580 in words is "twenty-eight million, four hundred eighty thousand, five hundred eighty".