28743169 has 32 divisors (see below), whose sum is σ = 38191104. Its totient is φ = 21003840.

The previous prime is 28743167. The next prime is 28743203. The reversal of 28743169 is 96134782.

It is not a de Polignac number, because 28743169 - 2¹ = 28743167 is a prime.

It is a super-2 number, since 2×28743169² = 1652339528325122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (28743163) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 64662 + ... + 65104.

It is an arithmetic number, because the mean of its divisors is an integer number (1193472).

Almost surely, 2^28743169 is an apocalyptic number.

It is an amenable number.

28743169 is a deficient number, since it is larger than the sum of its proper divisors (9447935).

28743169 is a wasteful number, since it uses less digits than its factorization.

28743169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 517.

The product of its digits is 72576, while the sum is 40.

The square root of 28743169 is about 5361.2656155054. The cubic root of 28743169 is about 306.3220192139.

The spelling of 28743169 in words is "twenty-eight million, seven hundred forty-three thousand, one hundred sixty-nine".