28939555 has 8 divisors (see below), whose sum is σ = 34810272. Its totient is φ = 23096448.

The previous prime is 28939531. The next prime is 28939577. The reversal of 28939555 is 55593982.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28939555 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 4519 + ... + 8848.

It is an arithmetic number, because the mean of its divisors is an integer number (4351284).

Almost surely, 2^28939555 is an apocalyptic number.

28939555 is a deficient number, since it is larger than the sum of its proper divisors (5870717).

28939555 is a wasteful number, since it uses less digits than its factorization.

28939555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13805.

The product of its digits is 486000, while the sum is 46.

The square root of 28939555 is about 5379.5497023450. The cubic root of 28939555 is about 307.0180787028.

The spelling of 28939555 in words is "twenty-eight million, nine hundred thirty-nine thousand, five hundred fifty-five".