28971283 has 16 divisors (see below), whose sum is σ = 33175296. Its totient is φ = 25043040.

The previous prime is 28971263. The next prime is 28971287. The reversal of 28971283 is 38217982.

It is not a de Polignac number, because 28971283 - 2⁵ = 28971251 is a prime.

It is not an unprimeable number, because it can be changed into a prime (28971287) 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 15 ways as a sum of consecutive naturals, for example, 77485 + ... + 77857.

It is an arithmetic number, because the mean of its divisors is an integer number (2073456).

Almost surely, 2^28971283 is an apocalyptic number.

28971283 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

28971283 is a deficient number, since it is larger than the sum of its proper divisors (4204013).

28971283 is a wasteful number, since it uses less digits than its factorization.

28971283 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 714.

The product of its digits is 48384, while the sum is 40.

The square root of 28971283 is about 5382.4978402225. The cubic root of 28971283 is about 307.1302379013.

The spelling of 28971283 in words is "twenty-eight million, nine hundred seventy-one thousand, two hundred eighty-three".