28068280 has 32 divisors (see below), whose sum is σ = 65901600. Its totient is φ = 10738816.

The previous prime is 28068277. The next prime is 28068307. The reversal of 28068280 is 8286082.

It is a happy number.

It is a congruent number.

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, 14335 + ... + 16174.

It is an arithmetic number, because the mean of its divisors is an integer number (2059425).

Almost surely, 2^28068280 is an apocalyptic number.

28068280 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

28068280 is an abundant number, since it is smaller than the sum of its proper divisors (37833320).

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

28068280 is a wasteful number, since it uses less digits than its factorization.

28068280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30543 (or 30539 counting only the distinct ones).

The product of its (nonzero) digits is 12288, while the sum is 34.

The square root of 28068280 is about 5297.9505471456. The cubic root of 28068280 is about 303.9055281239.

The spelling of 28068280 in words is "twenty-eight million, sixty-eight thousand, two hundred eighty".