28132222 has 8 divisors (see below), whose sum is σ = 42442776. Its totient is φ = 13984632.

The previous prime is 28132219. The next prime is 28132249. The reversal of 28132222 is 22223182.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 28132193 and 28132202.

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, 40308 + ... + 40999.

It is an arithmetic number, because the mean of its divisors is an integer number (5305347).

Almost surely, 2^28132222 is an apocalyptic number.

28132222 is a deficient number, since it is larger than the sum of its proper divisors (14310554).

28132222 is a wasteful number, since it uses less digits than its factorization.

28132222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81482.

The product of its digits is 768, while the sum is 22.

The square root of 28132222 is about 5303.9817118840. The cubic root of 28132222 is about 304.1361275734.

The spelling of 28132222 in words is "twenty-eight million, one hundred thirty-two thousand, two hundred twenty-two".