28698101 has 4 divisors (see below), whose sum is σ = 28778400. Its totient is φ = 28617804.

The previous prime is 28698083. The next prime is 28698107. The reversal of 28698101 is 10189682.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 10189682 = 2 ⋅5094841.

It is a cyclic number.

It is not a de Polignac number, because 28698101 - 2¹⁴ = 28681717 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28698107) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39611 + ... + 40328.

It is an arithmetic number, because the mean of its divisors is an integer number (7194600).

Almost surely, 2^28698101 is an apocalyptic number.

It is an amenable number.

28698101 is a deficient number, since it is larger than the sum of its proper divisors (80299).

28698101 is an equidigital number, since it uses as much as digits as its factorization.

28698101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 80298.

The product of its (nonzero) digits is 6912, while the sum is 35.

The square root of 28698101 is about 5357.0608546105. The cubic root of 28698101 is about 306.1618357348.

The spelling of 28698101 in words is "twenty-eight million, six hundred ninety-eight thousand, one hundred one".