12591228 has 24 divisors (see below), whose sum is σ = 31639888. Its totient is φ = 3874176.

The previous prime is 12591209. The next prime is 12591233. The reversal of 12591228 is 82219521.

It is a Smith number, since the sum of its digits (30) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 12591195 and 12591204.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 40201 + ... + 40512.

Almost surely, 2^12591228 is an apocalyptic number.

It is an amenable number.

12591228 is an abundant number, since it is smaller than the sum of its proper divisors (19048660).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

12591228 is a wasteful number, since it uses less digits than its factorization.

12591228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 80733 (or 80731 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 12591228 is about 3548.4120392085. The cubic root of 12591228 is about 232.6426642052.

The spelling of 12591228 in words is "twelve million, five hundred ninety-one thousand, two hundred twenty-eight".