33878544228 has 72 divisors (see below), whose sum is σ = 87355457280. Its totient is φ = 11068387200.

The previous prime is 33878544223. The next prime is 33878544253. The reversal of 33878544228 is 82244587833.

33878544228 is a `hidden beast` number, since 3 + 3 + 8 + 78 + 544 + 2 + 28 = 666.

It is a super-2 number, since 2×33878544228² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (33878544221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 346153 + ... + 433103.

It is an arithmetic number, because the mean of its divisors is an integer number (1213270240).

Almost surely, 2^33878544228 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 33878544228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (43677728640).

33878544228 is an abundant number, since it is smaller than the sum of its proper divisors (53476913052).

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

33878544228 is a wasteful number, since it uses less digits than its factorization.

33878544228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87177 (or 87172 counting only the distinct ones).

The product of its digits is 10321920, while the sum is 54.

The spelling of 33878544228 in words is "thirty-three billion, eight hundred seventy-eight million, five hundred forty-four thousand, two hundred twenty-eight".