28108553 has 16 divisors (see below), whose sum is σ = 32199552. Its totient is φ = 24288000.

The previous prime is 28108523. The next prime is 28108559. The reversal of 28108553 is 35580182.

It is a happy number.

It is not a de Polignac number, because 28108553 - 2⁶ = 28108489 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (28108559) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 60743 + ... + 61203.

It is an arithmetic number, because the mean of its divisors is an integer number (2012472).

Almost surely, 2^28108553 is an apocalyptic number.

28108553 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

28108553 is a deficient number, since it is larger than the sum of its proper divisors (4090999).

28108553 is a wasteful number, since it uses less digits than its factorization.

28108553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 736.

The product of its (nonzero) digits is 9600, while the sum is 32.

The square root of 28108553 is about 5301.7499941057. The cubic root of 28108553 is about 304.0508088264.

The spelling of 28108553 in words is "twenty-eight million, one hundred eight thousand, five hundred fifty-three".