28711248 has 20 divisors (see below), whose sum is σ = 74170848. Its totient is φ = 9570400.

The previous prime is 28711237. The next prime is 28711279. The reversal of 28711248 is 84211782.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 299028 + ... + 299123.

Almost surely, 2^28711248 is an apocalyptic number.

It is an amenable number.

28711248 is an abundant number, since it is smaller than the sum of its proper divisors (45459600).

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

28711248 is a wasteful number, since it uses less digits than its factorization.

28711248 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 598162 (or 598156 counting only the distinct ones).

The product of its digits is 7168, while the sum is 33.

The square root of 28711248 is about 5358.2877862243. The cubic root of 28711248 is about 306.2085809319.

The spelling of 28711248 in words is "twenty-eight million, seven hundred eleven thousand, two hundred forty-eight".