28127910 has 32 divisors (see below), whose sum is σ = 67806720. Its totient is φ = 7467488.

The previous prime is 28127909. The next prime is 28127921. The reversal of 28127910 is 1972182.

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

It is a congruent number.

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 5209 + ... + 9131.

It is an arithmetic number, because the mean of its divisors is an integer number (2118960).

Almost surely, 2^28127910 is an apocalyptic number.

28127910 is an abundant number, since it is smaller than the sum of its proper divisors (39678810).

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

28127910 is a wasteful number, since it uses less digits than its factorization.

28127910 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4172.

The product of its (nonzero) digits is 2016, while the sum is 30.

The square root of 28127910 is about 5303.5752092339. The cubic root of 28127910 is about 304.1205878364.

The spelling of 28127910 in words is "twenty-eight million, one hundred twenty-seven thousand, nine hundred ten".