28308101 has 8 divisors (see below), whose sum is σ = 29667264. Its totient is φ = 26959680.

The previous prime is 28308083. The next prime is 28308109. The reversal of 28308101 is 10180382.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 28308101 - 2²² = 24113797 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28308109) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2990 + ... + 8096.

It is an arithmetic number, because the mean of its divisors is an integer number (3708408).

Almost surely, 2^28308101 is an apocalyptic number.

It is an amenable number.

28308101 is a deficient number, since it is larger than the sum of its proper divisors (1359163).

28308101 is a wasteful number, since it uses less digits than its factorization.

28308101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5371.

The product of its (nonzero) digits is 384, while the sum is 23.

The square root of 28308101 is about 5320.5357812912. The cubic root of 28308101 is about 304.7686178461.

Adding to 28308101 its reverse (10180382), we get a palindrome (38488483).

The spelling of 28308101 in words is "twenty-eight million, three hundred eight thousand, one hundred one".