28471123 has 4 divisors (see below), whose sum is σ = 29008368. Its totient is φ = 27933880.

The previous prime is 28471111. The next prime is 28471133. The reversal of 28471123 is 32117482.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-28471123 is a prime.

It is a super-2 number, since 2×28471123² = 1621209689762258, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 28471091 and 28471100.

It is not an unprimeable number, because it can be changed into a prime (28471133) 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, 268543 + ... + 268648.

It is an arithmetic number, because the mean of its divisors is an integer number (7252092).

Almost surely, 2^28471123 is an apocalyptic number.

28471123 is a deficient number, since it is larger than the sum of its proper divisors (537245).

28471123 is an equidigital number, since it uses as much as digits as its factorization.

28471123 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 537244.

The product of its digits is 2688, while the sum is 28.

The square root of 28471123 is about 5335.8338617315. The cubic root of 28471123 is about 305.3525369091.

The spelling of 28471123 in words is "twenty-eight million, four hundred seventy-one thousand, one hundred twenty-three".