28889271 has 8 divisors (see below), whose sum is σ = 42798960. Its totient is φ = 19259496.

The previous prime is 28889233. The next prime is 28889281. The reversal of 28889271 is 17298882.

It is a happy number.

It is not a de Polignac number, because 28889271 - 2⁶ = 28889207 is a prime.

It is a super-2 number, since 2×28889271² = 1669179957822882, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28889281) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 534960 + ... + 535013.

It is an arithmetic number, because the mean of its divisors is an integer number (5349870).

Almost surely, 2^28889271 is an apocalyptic number.

28889271 is a deficient number, since it is larger than the sum of its proper divisors (13909689).

28889271 is a wasteful number, since it uses less digits than its factorization.

28889271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1069982 (or 1069976 counting only the distinct ones).

The product of its digits is 129024, while the sum is 45.

The square root of 28889271 is about 5374.8740450358. The cubic root of 28889271 is about 306.8401555890.

The spelling of 28889271 in words is "twenty-eight million, eight hundred eighty-nine thousand, two hundred seventy-one".