28768145 has 24 divisors (see below), whose sum is σ = 41553000. Its totient is φ = 19041792.

The previous prime is 28768139. The next prime is 28768153. The reversal of 28768145 is 54186782.

It can be written as a sum of positive squares in 4 ways, for example, as 1132096 + 27636049 = 1064^2 + 5257^2 .

It is not a de Polignac number, because 28768145 - 2⁶ = 28768081 is a prime.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5081 + ... + 9129.

It is an arithmetic number, because the mean of its divisors is an integer number (1731375).

Almost surely, 2^28768145 is an apocalyptic number.

It is an amenable number.

28768145 is a deficient number, since it is larger than the sum of its proper divisors (12784855).

28768145 is a wasteful number, since it uses less digits than its factorization.

28768145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4097 (or 4090 counting only the distinct ones).

The product of its digits is 107520, while the sum is 41.

The square root of 28768145 is about 5363.5944104677. The cubic root of 28768145 is about 306.4107183622.

The spelling of 28768145 in words is "twenty-eight million, seven hundred sixty-eight thousand, one hundred forty-five".