28110780 has 48 divisors (see below), whose sum is σ = 87457440. Its totient is φ = 7496064.

The previous prime is 28110757. The next prime is 28110781. The reversal of 28110780 is 8701182.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28110781) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25489 + ... + 26568.

It is an arithmetic number, because the mean of its divisors is an integer number (1822030).

Almost surely, 2^28110780 is an apocalyptic number.

28110780 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28110780 is an abundant number, since it is smaller than the sum of its proper divisors (59346660).

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

28110780 is a wasteful number, since it uses less digits than its factorization.

28110780 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52075 (or 52067 counting only the distinct ones).

The product of its (nonzero) digits is 896, while the sum is 27.

The square root of 28110780 is about 5301.9600149379. The cubic root of 28110780 is about 304.0588384496.

The spelling of 28110780 in words is "twenty-eight million, one hundred ten thousand, seven hundred eighty".