28226232 has 80 divisors (see below), whose sum is σ = 80978040. Its totient is φ = 9180864.

The previous prime is 28226203. The next prime is 28226257. The reversal of 28226232 is 23262282.

It is a happy number.

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

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 28226196 and 28226205.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 27358 + ... + 28370.

Almost surely, 2^28226232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 28226232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40489020).

28226232 is an abundant number, since it is smaller than the sum of its proper divisors (52751808).

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

28226232 is a wasteful number, since it uses less digits than its factorization.

28226232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1074 (or 1061 counting only the distinct ones).

The product of its digits is 4608, while the sum is 27.

The square root of 28226232 is about 5312.8365305174. The cubic root of 28226232 is about 304.4745301320.

The spelling of 28226232 in words is "twenty-eight million, two hundred twenty-six thousand, two hundred thirty-two".