28032955 has 4 divisors (see below), whose sum is σ = 33639552. Its totient is φ = 22426360.

The previous prime is 28032899. The next prime is 28032967. The reversal of 28032955 is 55923082.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55923082 = 2 ⋅27961541.

It is not a de Polignac number, because 28032955 - 2¹⁵ = 28000187 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 28032955.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2803291 + ... + 2803300.

It is an arithmetic number, because the mean of its divisors is an integer number (8409888).

Almost surely, 2^28032955 is an apocalyptic number.

28032955 is a deficient number, since it is larger than the sum of its proper divisors (5606597).

28032955 is an equidigital number, since it uses as much as digits as its factorization.

28032955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5606596.

The product of its (nonzero) digits is 21600, while the sum is 34.

The square root of 28032955 is about 5294.6156612166. The cubic root of 28032955 is about 303.7779823725. Note that the first 3 decimals are identical.

The spelling of 28032955 in words is "twenty-eight million, thirty-two thousand, nine hundred fifty-five".