28677760 has 32 divisors (see below), whose sum is σ = 68559300. Its totient is φ = 11470848.

The previous prime is 28677739. The next prime is 28677767. The reversal of 28677760 is 6777682.

It can be written as a sum of positive squares in 2 ways, for example, as 28643904 + 33856 = 5352^2 + 184^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is not an unprimeable number, because it can be changed into a prime (28677767) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 21765 + ... + 23044.

Almost surely, 2^28677760 is an apocalyptic number.

28677760 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28677760 is an abundant number, since it is smaller than the sum of its proper divisors (39881540).

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

28677760 is an equidigital number, since it uses as much as digits as its factorization.

28677760 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44828 (or 44816 counting only the distinct ones).

The product of its (nonzero) digits is 197568, while the sum is 43.

The square root of 28677760 is about 5355.1619956823. The cubic root of 28677760 is about 306.0894835625.

The spelling of 28677760 in words is "twenty-eight million, six hundred seventy-seven thousand, seven hundred sixty".