28949555 has 8 divisors (see below), whose sum is σ = 36783072. Its totient is φ = 21797248.

The previous prime is 28949539. The next prime is 28949573. The reversal of 28949555 is 55594982.

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 28949555 - 2⁴ = 28949539 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 170207 + ... + 170376.

It is an arithmetic number, because the mean of its divisors is an integer number (4597884).

Almost surely, 2^28949555 is an apocalyptic number.

28949555 is a deficient number, since it is larger than the sum of its proper divisors (7833517).

28949555 is a wasteful number, since it uses less digits than its factorization.

28949555 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340605.

The product of its digits is 648000, while the sum is 47.

The square root of 28949555 is about 5380.4790678898. The cubic root of 28949555 is about 307.0534377724.

The spelling of 28949555 in words is "twenty-eight million, nine hundred forty-nine thousand, five hundred fifty-five".