28810560 has 56 divisors (see below), whose sum is σ = 91476576. Its totient is φ = 7682560.

The previous prime is 28810519. The next prime is 28810567. The reversal of 28810560 is 6501882.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28810567) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14046 + ... + 15965.

Almost surely, 2^28810560 is an apocalyptic number.

28810560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28810560 is an abundant number, since it is smaller than the sum of its proper divisors (62666016).

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

28810560 is a wasteful number, since it uses less digits than its factorization.

28810560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30031 (or 30021 counting only the distinct ones).

The product of its (nonzero) digits is 3840, while the sum is 30.

The square root of 28810560 is about 5367.5469257381. The cubic root of 28810560 is about 306.5612323961.

The spelling of 28810560 in words is "twenty-eight million, eight hundred ten thousand, five hundred sixty".