28176228 has 48 divisors (see below), whose sum is σ = 73368960. Its totient is φ = 9351072.

The previous prime is 28176167. The next prime is 28176229. The reversal of 28176228 is 82267182.

It is a happy number.

28176228 is a `hidden beast` number, since 28 + 1 + 7 + 622 + 8 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 28176192 and 28176201.

It is not an unprimeable number, because it can be changed into a prime (28176229) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 33825 + ... + 34647.

It is an arithmetic number, because the mean of its divisors is an integer number (1528520).

Almost surely, 2^28176228 is an apocalyptic number.

It is an amenable number.

28176228 is an abundant number, since it is smaller than the sum of its proper divisors (45192732).

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

28176228 is a wasteful number, since it uses less digits than its factorization.

28176228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1153 (or 1145 counting only the distinct ones).

The product of its digits is 21504, while the sum is 36.

The square root of 28176228 is about 5308.1284837502. The cubic root of 28176228 is about 304.2946272221.

It can be divided in two parts, 2817 and 6228, that added together give a triangular number (9045 = T₁₃₄).

The spelling of 28176228 in words is "twenty-eight million, one hundred seventy-six thousand, two hundred twenty-eight".