32778228 has 48 divisors (see below), whose sum is σ = 88855424. Its totient is φ = 9210240.

The previous prime is 32778199. The next prime is 32778247. The reversal of 32778228 is 82287723.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1926 + ... + 8322.

Almost surely, 2^32778228 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 32778228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (44427712).

32778228 is an abundant number, since it is smaller than the sum of its proper divisors (56077196).

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

32778228 is a wasteful number, since it uses less digits than its factorization.

32778228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6472 (or 6470 counting only the distinct ones).

The product of its digits is 75264, while the sum is 39.

The square root of 32778228 is about 5725.2273317310. The cubic root of 32778228 is about 320.0332908073.

The spelling of 32778228 in words is "thirty-two million, seven hundred seventy-eight thousand, two hundred twenty-eight".