28798963 has 4 divisors (see below), whose sum is σ = 28810960. Its totient is φ = 28786968.

The previous prime is 28798937. The next prime is 28798997. The reversal of 28798963 is 36989782.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 36989782 = 2 ⋅18494891.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28798963 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 28798963.

It is not an unprimeable number, because it can be changed into a prime (28798463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1020 + ... + 7657.

It is an arithmetic number, because the mean of its divisors is an integer number (7202740).

Almost surely, 2^28798963 is an apocalyptic number.

28798963 is a deficient number, since it is larger than the sum of its proper divisors (11997).

28798963 is an equidigital number, since it uses as much as digits as its factorization.

28798963 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11996.

The product of its digits is 1306368, while the sum is 52.

The square root of 28798963 is about 5366.4665283592. The cubic root of 28798963 is about 306.5200939184.

The spelling of 28798963 in words is "twenty-eight million, seven hundred ninety-eight thousand, nine hundred sixty-three".