71228 has 6 divisors (see below), whose sum is σ = 124656. Its totient is φ = 35612.

The previous prime is 71209. The next prime is 71233. The reversal of 71228 is 82217.

It is a super-3 number, since 3×71228³ = 1084110385333056, which contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 8900 + ... + 8907.

It is an arithmetic number, because the mean of its divisors is an integer number (20776).

2⁷¹²²⁸ is an apocalyptic number.

It is an amenable number.

71228 is a deficient number, since it is larger than the sum of its proper divisors (53428).

71228 is a wasteful number, since it uses less digits than its factorization.

71228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17811 (or 17809 counting only the distinct ones).

The product of its digits is 224, while the sum is 20.

The square root of 71228 is about 266.8857433435. The cubic root of 71228 is about 41.4524543794.

The spelling of 71228 in words is "seventy-one thousand, two hundred twenty-eight".