28773899 has 16 divisors (see below), whose sum is σ = 36372480. Its totient is φ = 22109760.

The previous prime is 28773893. The next prime is 28773919. The reversal of 28773899 is 99837782.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28773899 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28773899.

It is not an unprimeable number, because it can be changed into a prime (28773893) 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 15 ways as a sum of consecutive naturals, for example, 3062 + ... + 8180.

It is an arithmetic number, because the mean of its divisors is an integer number (2273280).

Almost surely, 2^28773899 is an apocalyptic number.

28773899 is a deficient number, since it is larger than the sum of its proper divisors (7598581).

28773899 is a wasteful number, since it uses less digits than its factorization.

28773899 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5210.

The product of its digits is 1524096, while the sum is 53.

The square root of 28773899 is about 5364.1307776750. The cubic root of 28773899 is about 306.4311456988.

It can be divided in two parts, 2877 and 3899, that added together give a palindrome (6776).

The spelling of 28773899 in words is "twenty-eight million, seven hundred seventy-three thousand, eight hundred ninety-nine".