7143228 has 36 divisors (see below), whose sum is σ = 18727800. Its totient is φ = 2380752.

The previous prime is 7143223. The next prime is 7143233. The reversal of 7143228 is 8223417.

It is an interprime number because it is at equal distance from previous prime (7143223) and next prime (7143233).

It is a tau number, because it is divible by the number of its divisors (36).

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7143223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2703 + ... + 4646.

Almost surely, 2^7143228 is an apocalyptic number.

It is an amenable number.

7143228 is an abundant number, since it is smaller than the sum of its proper divisors (11584572).

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

7143228 is a wasteful number, since it uses less digits than its factorization.

7143228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7368 (or 7354 counting only the distinct ones).

The product of its digits is 2688, while the sum is 27.

The square root of 7143228 is about 2672.6817992421. The cubic root of 7143228 is about 192.5890115139.

The spelling of 7143228 in words is "seven million, one hundred forty-three thousand, two hundred twenty-eight".