28768434 has 16 divisors (see below), whose sum is σ = 59393280. Its totient is φ = 9280080.

The previous prime is 28768427. The next prime is 28768447. The reversal of 28768434 is 43486782.

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, 77149 + ... + 77520.

It is an arithmetic number, because the mean of its divisors is an integer number (3712080).

Almost surely, 2^28768434 is an apocalyptic number.

28768434 is an abundant number, since it is smaller than the sum of its proper divisors (30624846).

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

28768434 is a wasteful number, since it uses less digits than its factorization.

28768434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 154705.

The product of its digits is 258048, while the sum is 42.

The square root of 28768434 is about 5363.6213512887. The cubic root of 28768434 is about 306.4117444091.

The spelling of 28768434 in words is "twenty-eight million, seven hundred sixty-eight thousand, four hundred thirty-four".