28166069 has 8 divisors (see below), whose sum is σ = 28728000. Its totient is φ = 27607072.

The previous prime is 28166027. The next prime is 28166077. The reversal of 28166069 is 96066182.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28166069 is a prime.

It is a super-2 number, since 2×28166069² = 1586654885825522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28166269) 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, 33152 + ... + 33990.

It is an arithmetic number, because the mean of its divisors is an integer number (3591000).

Almost surely, 2^28166069 is an apocalyptic number.

It is an amenable number.

28166069 is a deficient number, since it is larger than the sum of its proper divisors (561931).

28166069 is an equidigital number, since it uses as much as digits as its factorization.

28166069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1467.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 28166069 is about 5307.1714688712. The cubic root of 28166069 is about 304.2580514638.

The spelling of 28166069 in words is "twenty-eight million, one hundred sixty-six thousand, sixty-nine".