28928801 has 6 divisors (see below), whose sum is σ = 31797906. Its totient is φ = 26298800.

The previous prime is 28928789. The next prime is 28928803. The reversal of 28928801 is 10882982.

It can be written as a sum of positive squares in only one way, i.e., 27300625 + 1628176 = 5225^2 + 1276^2 .

It is a de Polignac number, because none of the positive numbers 2^k-28928801 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28928803) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 119420 + ... + 119661.

It is an arithmetic number, because the mean of its divisors is an integer number (5299651).

Almost surely, 2^28928801 is an apocalyptic number.

It is an amenable number.

28928801 is a deficient number, since it is larger than the sum of its proper divisors (2869105).

28928801 is a wasteful number, since it uses less digits than its factorization.

28928801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 239103 (or 239092 counting only the distinct ones).

The product of its (nonzero) digits is 18432, while the sum is 38.

The square root of 28928801 is about 5378.5500834333. The cubic root of 28928801 is about 306.9800444682.

It can be divided in two parts, 28 and 928801, that added together give a palindrome (928829).

The spelling of 28928801 in words is "twenty-eight million, nine hundred twenty-eight thousand, eight hundred one".