32281228 has 24 divisors (see below), whose sum is σ = 67961600. Its totient is φ = 13106448.

The previous prime is 32281219. The next prime is 32281229. The reversal of 32281228 is 82218223.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 32281196 and 32281205.

It is not an unprimeable number, because it can be changed into a prime (32281229) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29808 + ... + 30871.

Almost surely, 2^32281228 is an apocalyptic number.

32281228 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

32281228 is an abundant number, since it is smaller than the sum of its proper divisors (35680372).

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

32281228 is a wasteful number, since it uses less digits than its factorization.

32281228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 60709 (or 60707 counting only the distinct ones).

The product of its digits is 3072, while the sum is 28.

The square root of 32281228 is about 5681.6571526272. The cubic root of 32281228 is about 318.4075441383.

The spelling of 32281228 in words is "thirty-two million, two hundred eighty-one thousand, two hundred twenty-eight".