28214101 has 4 divisors (see below), whose sum is σ = 29873772. Its totient is φ = 26554432.

The previous prime is 28214089. The next prime is 28214113. The reversal of 28214101 is 10141282.

It is a happy number.

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

It is an interprime number because it is at equal distance from previous prime (28214089) and next prime (28214113).

It can be written as a sum of positive squares in 2 ways, for example, as 25010001 + 3204100 = 5001^2 + 1790^2 .

It is a cyclic number.

It is not a de Polignac number, because 28214101 - 2⁷ = 28213973 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 (28214141) 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 3 ways as a sum of consecutive naturals, for example, 829810 + ... + 829843.

It is an arithmetic number, because the mean of its divisors is an integer number (7468443).

Almost surely, 2^28214101 is an apocalyptic number.

It is an amenable number.

28214101 is a deficient number, since it is larger than the sum of its proper divisors (1659671).

28214101 is a wasteful number, since it uses less digits than its factorization.

28214101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1659670.

The product of its (nonzero) digits is 128, while the sum is 19.

The square root of 28214101 is about 5311.6947389699. The cubic root of 28214101 is about 304.4309051122.

Adding to 28214101 its reverse (10141282), we get a palindrome (38355383).

The spelling of 28214101 in words is "twenty-eight million, two hundred fourteen thousand, one hundred one".