28746169 has 4 divisors (see below), whose sum is σ = 28756980. Its totient is φ = 28735360.

The previous prime is 28746161. The next prime is 28746181. The reversal of 28746169 is 96164782.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in 2 ways, for example, as 10810944 + 17935225 = 3288^2 + 4235^2 .

It is a cyclic number.

It is not a de Polignac number, because 28746169 - 2³ = 28746161 is a prime.

It is a super-2 number, since 2×28746169² = 1652684464353122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28746161) 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, 1677 + ... + 7765.

It is an arithmetic number, because the mean of its divisors is an integer number (7189245).

Almost surely, 2^28746169 is an apocalyptic number.

It is an amenable number.

28746169 is a deficient number, since it is larger than the sum of its proper divisors (10811).

28746169 is an equidigital number, since it uses as much as digits as its factorization.

28746169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10810.

The product of its digits is 145152, while the sum is 43.

The square root of 28746169 is about 5361.5453928881. The cubic root of 28746169 is about 306.3326760542.

The spelling of 28746169 in words is "twenty-eight million, seven hundred forty-six thousand, one hundred sixty-nine".