7718228 has 12 divisors (see below), whose sum is σ = 15436512. Its totient is φ = 3307800.

The previous prime is 7718219. The next prime is 7718251. The reversal of 7718228 is 8228177.

7718228 is an admirable number.

It is a hoax number, since the sum of its digits (35) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 137798 + ... + 137853.

It is an arithmetic number, because the mean of its divisors is an integer number (1286376).

Almost surely, 2^7718228 is an apocalyptic number.

It is an amenable number.

7718228 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

7718228 is a wasteful number, since it uses less digits than its factorization.

7718228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275662 (or 275660 counting only the distinct ones).

The product of its digits is 12544, while the sum is 35.

The square root of 7718228 is about 2778.1699012119. The cubic root of 7718228 is about 197.6237796948.

The spelling of 7718228 in words is "seven million, seven hundred eighteen thousand, two hundred twenty-eight".