28820153 has 4 divisors (see below), whose sum is σ = 28853748. Its totient is φ = 28786560.

The previous prime is 28820149. The next prime is 28820167. The reversal of 28820153 is 35102882.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 35102882 = 2 ⋅17551441.

It can be written as a sum of positive squares in 2 ways, for example, as 9784384 + 19035769 = 3128^2 + 4363^2 .

It is a cyclic number.

It is not a de Polignac number, because 28820153 - 2² = 28820149 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28820453) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15476 + ... + 17237.

It is an arithmetic number, because the mean of its divisors is an integer number (7213437).

Almost surely, 2^28820153 is an apocalyptic number.

It is an amenable number.

28820153 is a deficient number, since it is larger than the sum of its proper divisors (33595).

28820153 is an equidigital number, since it uses as much as digits as its factorization.

28820153 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33594.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 28820153 is about 5368.4404625552. The cubic root of 28820153 is about 306.5952536666.

The spelling of 28820153 in words is "twenty-eight million, eight hundred twenty thousand, one hundred fifty-three".