28888553 has 4 divisors (see below), whose sum is σ = 29884740. Its totient is φ = 27892368.

The previous prime is 28888549. The next prime is 28888571. The reversal of 28888553 is 35588882.

It is a happy number.

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

It can be written as a sum of positive squares in 2 ways, for example, as 18731584 + 10156969 = 4328^2 + 3187^2 .

It is a cyclic number.

It is not a de Polignac number, because 28888553 - 2² = 28888549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28888498 and 28888507.

It is not an unprimeable number, because it can be changed into a prime (28888523) 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, 498050 + ... + 498107.

It is an arithmetic number, because the mean of its divisors is an integer number (7471185).

Almost surely, 2^28888553 is an apocalyptic number.

It is an amenable number.

28888553 is a deficient number, since it is larger than the sum of its proper divisors (996187).

28888553 is an equidigital number, since it uses as much as digits as its factorization.

28888553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 996186.

The product of its digits is 614400, while the sum is 47.

The square root of 28888553 is about 5374.8072523580. The cubic root of 28888553 is about 306.8376135489.

The spelling of 28888553 in words is "twenty-eight million, eight hundred eighty-eight thousand, five hundred fifty-three".