28898101 has 4 divisors (see below), whose sum is σ = 28909804. Its totient is φ = 28886400.

The previous prime is 28898099. The next prime is 28898117. The reversal of 28898101 is 10189882.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 11383876 + 17514225 = 3374^2 + 4185^2 .

It is a cyclic number.

It is not a de Polignac number, because 28898101 - 2¹ = 28898099 is a prime.

It is a super-3 number, since 3×28898101³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28898161) 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, 540 + ... + 7621.

It is an arithmetic number, because the mean of its divisors is an integer number (7227451).

Almost surely, 2^28898101 is an apocalyptic number.

It is an amenable number.

28898101 is a deficient number, since it is larger than the sum of its proper divisors (11703).

28898101 is an equidigital number, since it uses as much as digits as its factorization.

28898101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11702.

The product of its (nonzero) digits is 9216, while the sum is 37.

The square root of 28898101 is about 5375.6953968766. The cubic root of 28898101 is about 306.8714142822.

It can be divided in two parts, 288 and 98101, that added together give a palindrome (98389).

The spelling of 28898101 in words is "twenty-eight million, eight hundred ninety-eight thousand, one hundred one".