28126860 has 24 divisors (see below), whose sum is σ = 78755376. Its totient is φ = 7500480.

The previous prime is 28126849. The next prime is 28126867. The reversal of 28126860 is 6862182.

It is a super-2 number, since 2×28126860² = 1582240506919200, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28126867) 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, 234331 + ... + 234450.

It is an arithmetic number, because the mean of its divisors is an integer number (3281474).

Almost surely, 2^28126860 is an apocalyptic number.

28126860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28126860 is an abundant number, since it is smaller than the sum of its proper divisors (50628516).

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

28126860 is a wasteful number, since it uses less digits than its factorization.

28126860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 468793 (or 468791 counting only the distinct ones).

The product of its (nonzero) digits is 9216, while the sum is 33.

The square root of 28126860 is about 5303.4762184816. The cubic root of 28126860 is about 304.1168035691.

The spelling of 28126860 in words is "twenty-eight million, one hundred twenty-six thousand, eight hundred sixty".