28798855 has 4 divisors (see below), whose sum is σ = 34558632. Its totient is φ = 23039080.

The previous prime is 28798853. The next prime is 28798873. The reversal of 28798855 is 55889782.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 28798855 - 2¹ = 28798853 is a prime.

It is a super-2 number, since 2×28798855² = 1658748098622050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28798853) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2879881 + ... + 2879890.

It is an arithmetic number, because the mean of its divisors is an integer number (8639658).

Almost surely, 2^28798855 is an apocalyptic number.

28798855 is a deficient number, since it is larger than the sum of its proper divisors (5759777).

28798855 is an equidigital number, since it uses as much as digits as its factorization.

28798855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5759776.

The product of its digits is 1612800, while the sum is 52.

The square root of 28798855 is about 5366.4564658627. The cubic root of 28798855 is about 306.5197107540.

The spelling of 28798855 in words is "twenty-eight million, seven hundred ninety-eight thousand, eight hundred fifty-five".