28749768 has 16 divisors (see below), whose sum is σ = 71874480. Its totient is φ = 9583248.

The previous prime is 28749719. The next prime is 28749811. The reversal of 28749768 is 86794782.

It is a self number, because there is not a number n which added to its sum of digits gives 28749768.

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, 598930 + ... + 598977.

It is an arithmetic number, because the mean of its divisors is an integer number (4492155).

Almost surely, 2^28749768 is an apocalyptic number.

It is an amenable number.

28749768 is an abundant number, since it is smaller than the sum of its proper divisors (43124712).

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

28749768 is a wasteful number, since it uses less digits than its factorization.

28749768 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1197916 (or 1197912 counting only the distinct ones).

The product of its digits is 1354752, while the sum is 51.

The square root of 28749768 is about 5361.8810132266. The cubic root of 28749768 is about 306.3454597321.

The spelling of 28749768 in words is "twenty-eight million, seven hundred forty-nine thousand, seven hundred sixty-eight".