28214189 has 4 divisors (see below), whose sum is σ = 28332480. Its totient is φ = 28095900.

The previous prime is 28214177. The next prime is 28214201. The reversal of 28214189 is 98141282.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is an interprime number because it is at equal distance from previous prime (28214177) and next prime (28214201).

It is a cyclic number.

It is not a de Polignac number, because 28214189 - 2²⁰ = 27165613 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 (28214119) 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, 58787 + ... + 59264.

It is an arithmetic number, because the mean of its divisors is an integer number (7083120).

Almost surely, 2^28214189 is an apocalyptic number.

It is an amenable number.

28214189 is a deficient number, since it is larger than the sum of its proper divisors (118291).

28214189 is a wasteful number, since it uses less digits than its factorization.

28214189 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 118290.

The product of its digits is 9216, while the sum is 35.

The square root of 28214189 is about 5311.7030225720. The cubic root of 28214189 is about 304.4312216193.

The spelling of 28214189 in words is "twenty-eight million, two hundred fourteen thousand, one hundred eighty-nine".