28123072 has 28 divisors (see below), whose sum is σ = 56866536. Its totient is φ = 13794560.

The previous prime is 28123063. The next prime is 28123087. The reversal of 28123072 is 27032182.

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 3 ways as a sum of consecutive naturals, for example, 754 + ... + 7537.

Almost surely, 2^28123072 is an apocalyptic number.

It is an amenable number.

28123072 is an abundant number, since it is smaller than the sum of its proper divisors (28743464).

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

28123072 is an equidigital number, since it uses as much as digits as its factorization.

28123072 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8356 (or 8346 counting only the distinct ones).

The product of its (nonzero) digits is 1344, while the sum is 25.

The square root of 28123072 is about 5303.1190822006. The cubic root of 28123072 is about 304.1031505915.

The spelling of 28123072 in words is "twenty-eight million, one hundred twenty-three thousand, seventy-two".