28767288 has 32 divisors (see below), whose sum is σ = 78456960. Its totient is φ = 8717280.

The previous prime is 28767259. The next prime is 28767307. The reversal of 28767288 is 88276782.

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, 54220 + ... + 54747.

It is an arithmetic number, because the mean of its divisors is an integer number (2451780).

Almost surely, 2^28767288 is an apocalyptic number.

It is an amenable number.

28767288 is an abundant number, since it is smaller than the sum of its proper divisors (49689672).

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

28767288 is a wasteful number, since it uses less digits than its factorization.

28767288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 108987 (or 108983 counting only the distinct ones).

The product of its digits is 602112, while the sum is 48.

The square root of 28767288 is about 5363.5145194173. The cubic root of 28767288 is about 306.4076756843.

The spelling of 28767288 in words is "twenty-eight million, seven hundred sixty-seven thousand, two hundred eighty-eight".