28969163 has 4 divisors (see below), whose sum is σ = 29025288. Its totient is φ = 28913040.

The previous prime is 28969153. The next prime is 28969183. The reversal of 28969163 is 36196982.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 36196982 = 2 ⋅18098491.

It is a cyclic number.

It is not a de Polignac number, because 28969163 - 2¹⁰ = 28968139 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28969103) 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, 27281 + ... + 28322.

It is an arithmetic number, because the mean of its divisors is an integer number (7256322).

Almost surely, 2^28969163 is an apocalyptic number.

28969163 is a deficient number, since it is larger than the sum of its proper divisors (56125).

28969163 is an equidigital number, since it uses as much as digits as its factorization.

28969163 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 56124.

The product of its digits is 139968, while the sum is 44.

The square root of 28969163 is about 5382.3009020307. The cubic root of 28969163 is about 307.1227462070.

The spelling of 28969163 in words is "twenty-eight million, nine hundred sixty-nine thousand, one hundred sixty-three".