28800280 has 16 divisors (see below), whose sum is σ = 64800720. Its totient is φ = 11520096.

The previous prime is 28800263. The next prime is 28800281. The reversal of 28800280 is 8200882.

It is a super-2 number, since 2×28800280² = 1658912256156800, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28800281) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 359964 + ... + 360043.

It is an arithmetic number, because the mean of its divisors is an integer number (4050045).

Almost surely, 2^28800280 is an apocalyptic number.

28800280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28800280 is an abundant number, since it is smaller than the sum of its proper divisors (36000440).

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

28800280 is a wasteful number, since it uses less digits than its factorization.

28800280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 720018 (or 720014 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 28.

The square root of 28800280 is about 5366.5892333958. The cubic root of 28800280 is about 306.5247663183.

The spelling of 28800280 in words is "twenty-eight million, eight hundred thousand, two hundred eighty".