28845801 has 14 divisors (see below), whose sum is σ = 43250010. Its totient is φ = 19230048.

The previous prime is 28845799. The next prime is 28845811. The reversal of 28845801 is 10854882.

It can be written as a sum of positive squares in only one way, i.e., 25765776 + 3080025 = 5076^2 + 1755^2 .

It is not a de Polignac number, because 28845801 - 2¹ = 28845799 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28845811) 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 13 ways as a sum of consecutive naturals, for example, 19056 + ... + 20513.

Almost surely, 2^28845801 is an apocalyptic number.

It is an amenable number.

28845801 is a deficient number, since it is larger than the sum of its proper divisors (14404209).

28845801 is an frugal number, since it uses more digits than its factorization.

28845801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39587 (or 39572 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 36.

The square root of 28845801 is about 5370.8287070060. The cubic root of 28845801 is about 306.6861764263.

It can be divided in two parts, 28845 and 801, that added together give a triangular number (29646 = T₂₄₃).

The spelling of 28845801 in words is "twenty-eight million, eight hundred forty-five thousand, eight hundred one".