28670027 has 4 divisors (see below), whose sum is σ = 28691520. Its totient is φ = 28648536.

The previous prime is 28670023. The next prime is 28670063. The reversal of 28670027 is 72007682.

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

It is a cyclic number.

It is not a de Polignac number, because 28670027 - 2² = 28670023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28669975 and 28670002.

It is not an unprimeable number, because it can be changed into a prime (28670023) 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, 8603 + ... + 11460.

It is an arithmetic number, because the mean of its divisors is an integer number (7172880).

Almost surely, 2^28670027 is an apocalyptic number.

28670027 is a deficient number, since it is larger than the sum of its proper divisors (21493).

28670027 is a wasteful number, since it uses less digits than its factorization.

28670027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21492.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 28670027 is about 5354.4399333637. The cubic root of 28670027 is about 306.0619685966.

The spelling of 28670027 in words is "twenty-eight million, six hundred seventy thousand, twenty-seven".