28912055 has 4 divisors (see below), whose sum is σ = 34694472. Its totient is φ = 23129640.

The previous prime is 28912049. The next prime is 28912099. The reversal of 28912055 is 55021982.

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

It is not a de Polignac number, because 28912055 - 2¹⁰ = 28911031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2891201 + ... + 2891210.

It is an arithmetic number, because the mean of its divisors is an integer number (8673618).

Almost surely, 2^28912055 is an apocalyptic number.

28912055 is a deficient number, since it is larger than the sum of its proper divisors (5782417).

28912055 is an equidigital number, since it uses as much as digits as its factorization.

28912055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5782416.

The product of its (nonzero) digits is 7200, while the sum is 32.

The square root of 28912055 is about 5376.9931188351. The cubic root of 28912055 is about 306.9207992420.

The spelling of 28912055 in words is "twenty-eight million, nine hundred twelve thousand, fifty-five".