28302928 has 20 divisors (see below), whose sum is σ = 56320180. Its totient is φ = 13768704.

The previous prime is 28302919. The next prime is 28302941. The reversal of 28302928 is 82920382.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 12873744 + 15429184 = 3588^2 + 3928^2 .

It is a junction number, because it is equal to n+sod(n) for n = 28302893 and 28302902.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23313 + ... + 24496.

It is an arithmetic number, because the mean of its divisors is an integer number (2816009).

Almost surely, 2^28302928 is an apocalyptic number.

It is an amenable number.

28302928 is a deficient number, since it is larger than the sum of its proper divisors (28017252).

28302928 is a wasteful number, since it uses less digits than its factorization.

28302928 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47854 (or 47848 counting only the distinct ones).

The product of its (nonzero) digits is 13824, while the sum is 34.

The square root of 28302928 is about 5320.0496238287. The cubic root of 28302928 is about 304.7500523230.

The spelling of 28302928 in words is "twenty-eight million, three hundred two thousand, nine hundred twenty-eight".