28051055 has 4 divisors (see below), whose sum is σ = 33661272. Its totient is φ = 22440840.

The previous prime is 28051031. The next prime is 28051061. The reversal of 28051055 is 55015082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55015082 = 2 ⋅27507541.

It is not a de Polignac number, because 28051055 - 2⁶ = 28050991 is a prime.

It is a super-2 number, since 2×28051055² = 1573723373226050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 2805101 + ... + 2805110.

It is an arithmetic number, because the mean of its divisors is an integer number (8415318).

Almost surely, 2^28051055 is an apocalyptic number.

28051055 is a deficient number, since it is larger than the sum of its proper divisors (5610217).

28051055 is an equidigital number, since it uses as much as digits as its factorization.

28051055 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5610216.

The product of its (nonzero) digits is 2000, while the sum is 26.

The square root of 28051055 is about 5296.3246690512. The cubic root of 28051055 is about 303.8433482787.

The spelling of 28051055 in words is "twenty-eight million, fifty-one thousand, fifty-five".