28067101 has 4 divisors (see below), whose sum is σ = 28183804. Its totient is φ = 27950400.

The previous prime is 28067093. The next prime is 28067111. The reversal of 28067101 is 10176082.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10208025 + 17859076 = 3195^2 + 4226^2 .

It is a cyclic number.

It is not a de Polignac number, because 28067101 - 2³ = 28067093 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 (28067111) 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, 57990 + ... + 58471.

It is an arithmetic number, because the mean of its divisors is an integer number (7045951).

Almost surely, 2^28067101 is an apocalyptic number.

It is an amenable number.

28067101 is a deficient number, since it is larger than the sum of its proper divisors (116703).

28067101 is a wasteful number, since it uses less digits than its factorization.

28067101 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116702.

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

The square root of 28067101 is about 5297.8392765353. The cubic root of 28067101 is about 303.9012729097.

The spelling of 28067101 in words is "twenty-eight million, sixty-seven thousand, one hundred one".