28730276 has 12 divisors (see below), whose sum is σ = 50466780. Its totient is φ = 14311200.

The previous prime is 28730267. The next prime is 28730281. The reversal of 28730276 is 67203782.

It can be written as a sum of positive squares in 2 ways, for example, as 1960000 + 26770276 = 1400^2 + 5174^2 .

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

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, 12275 + ... + 14426.

It is an arithmetic number, because the mean of its divisors is an integer number (4205565).

Almost surely, 2^28730276 is an apocalyptic number.

It is an amenable number.

28730276 is a deficient number, since it is larger than the sum of its proper divisors (21736504).

28730276 is a wasteful number, since it uses less digits than its factorization.

28730276 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26974 (or 26972 counting only the distinct ones).

The product of its (nonzero) digits is 28224, while the sum is 35.

The square root of 28730276 is about 5360.0630593306. The cubic root of 28730276 is about 306.2762112232.

The spelling of 28730276 in words is "twenty-eight million, seven hundred thirty thousand, two hundred seventy-six".