28607169 has 16 divisors (see below), whose sum is σ = 39252224. Its totient is φ = 18522000.

The previous prime is 28607149. The next prime is 28607213. The reversal of 28607169 is 96170682.

It is a de Polignac number, because none of the positive numbers 2^k-28607169 is a prime.

It is a super-2 number, since 2×28607169² = 1636740236389122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28607129) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26694 + ... + 27744.

It is an arithmetic number, because the mean of its divisors is an integer number (2453264).

Almost surely, 2^28607169 is an apocalyptic number.

It is an amenable number.

28607169 is a deficient number, since it is larger than the sum of its proper divisors (10645055).

28607169 is a wasteful number, since it uses less digits than its factorization.

28607169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1308.

The product of its (nonzero) digits is 36288, while the sum is 39.

The square root of 28607169 is about 5348.5670043480. The cubic root of 28607169 is about 305.8381283210.

The spelling of 28607169 in words is "twenty-eight million, six hundred seven thousand, one hundred sixty-nine".