28798555 has 8 divisors (see below), whose sum is σ = 34587072. Its totient is φ = 23019648.

The previous prime is 28798541. The next prime is 28798579. The reversal of 28798555 is 55589782.

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 28798555 - 2⁹ = 28798043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28798499 and 28798508.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 10707 + ... + 13123.

It is an arithmetic number, because the mean of its divisors is an integer number (4323384).

Almost surely, 2^28798555 is an apocalyptic number.

28798555 is a deficient number, since it is larger than the sum of its proper divisors (5788517).

28798555 is a wasteful number, since it uses less digits than its factorization.

28798555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4805.

The product of its digits is 1008000, while the sum is 49.

The square root of 28798555 is about 5366.4285143846. The cubic root of 28798555 is about 306.5186464035.

The spelling of 28798555 in words is "twenty-eight million, seven hundred ninety-eight thousand, five hundred fifty-five".