28072268 has 24 divisors (see below), whose sum is σ = 56260512. Its totient is φ = 12006144.

The previous prime is 28072241. The next prime is 28072271. The reversal of 28072268 is 86227082.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20996 + ... + 22292.

It is an arithmetic number, because the mean of its divisors is an integer number (2344188).

Almost surely, 2^28072268 is an apocalyptic number.

28072268 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

28072268 is an abundant number, since it is smaller than the sum of its proper divisors (28188244).

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

28072268 is a wasteful number, since it uses less digits than its factorization.

28072268 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2081 (or 2079 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 28072268 is about 5298.3269057317. The cubic root of 28072268 is about 303.9199206203.

The spelling of 28072268 in words is "twenty-eight million, seventy-two thousand, two hundred sixty-eight".