28776801 has 8 divisors (see below), whose sum is σ = 40626144. Its totient is φ = 18056000.

The previous prime is 28776799. The next prime is 28776821. The reversal of 28776801 is 10867782.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 28776801 - 2¹ = 28776799 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 28776801.

It is not an unprimeable number, because it can be changed into a prime (28776821) 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 7 ways as a sum of consecutive naturals, for example, 282075 + ... + 282176.

It is an arithmetic number, because the mean of its divisors is an integer number (5078268).

Almost surely, 2^28776801 is an apocalyptic number.

It is an amenable number.

28776801 is a deficient number, since it is larger than the sum of its proper divisors (11849343).

28776801 is a wasteful number, since it uses less digits than its factorization.

28776801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 564271.

The product of its (nonzero) digits is 37632, while the sum is 39.

The square root of 28776801 is about 5364.4012713443. The cubic root of 28776801 is about 306.4414470867.

The spelling of 28776801 in words is "twenty-eight million, seven hundred seventy-six thousand, eight hundred one".