28670101 has 2 divisors, whose sum is σ = 28670102. Its totient is φ = 28670100.

The previous prime is 28670087. The next prime is 28670179. The reversal of 28670101 is 10107682.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28143025 + 527076 = 5305^2 + 726^2 .

It is a cyclic number.

It is not a de Polignac number, because 28670101 - 2¹¹ = 28668053 is a prime.

It is equal to p_1780531 and since 28670101 and 1780531 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28671101) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14335050 + 14335051.

It is an arithmetic number, because the mean of its divisors is an integer number (14335051).

Almost surely, 2^28670101 is an apocalyptic number.

It is an amenable number.

28670101 is a deficient number, since it is larger than the sum of its proper divisors (1).

28670101 is an equidigital number, since it uses as much as digits as its factorization.

28670101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 672, while the sum is 25.

The square root of 28670101 is about 5354.4468435124. The cubic root of 28670101 is about 306.0622319212.

Adding to 28670101 its reverse (10107682), we get a palindrome (38777783).

The spelling of 28670101 in words is "twenty-eight million, six hundred seventy thousand, one hundred one".