7863228 has 18 divisors (see below), whose sum is σ = 19876584. Its totient is φ = 2621064.

The previous prime is 7863227. The next prime is 7863253. The reversal of 7863228 is 8223687.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 218423 = 7863228 / (7 + 8 + 6 + 3 + 2 + 2 + 8).

It is a d-powerful number, because it can be written as 7⁸ + 8 + 6³ + 3³ + 2⁹ + 2²¹ + 8³ .

It is a junction number, because it is equal to n+sod(n) for n = 7863192 and 7863201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (7863227) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 109176 + ... + 109247.

Almost surely, 2^7863228 is an apocalyptic number.

It is an amenable number.

7863228 is an abundant number, since it is smaller than the sum of its proper divisors (12013356).

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

7863228 is a wasteful number, since it uses less digits than its factorization.

7863228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 218433 (or 218428 counting only the distinct ones).

The product of its digits is 32256, while the sum is 36.

The square root of 7863228 is about 2804.1447894144. The cubic root of 7863228 is about 198.8536755879.

The spelling of 7863228 in words is "seven million, eight hundred sixty-three thousand, two hundred twenty-eight".