2104278228 has 72 divisors (see below), whose sum is σ = 5758240488. Its totient is φ = 644087808.

The previous prime is 2104278223. The next prime is 2104278263. The reversal of 2104278228 is 8228724012.

2104278228 is a `hidden beast` number, since 2 + 1 + 0 + 427 + 8 + 228 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 58706244 + 2045571984 = 7662^2 + 45228^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a junction number, because it is equal to n+sod(n) for n = 2104278192 and 2104278201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2104278223) 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, 78676 + ... + 101972.

Almost surely, 2^2104278228 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 2104278228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2879120244).

2104278228 is an abundant number, since it is smaller than the sum of its proper divisors (3653962260).

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

2104278228 is a wasteful number, since it uses less digits than its factorization.

2104278228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23513 (or 23508 counting only the distinct ones).

The product of its (nonzero) digits is 28672, while the sum is 36.

The square root of 2104278228 is about 45872.4124937854. The cubic root of 2104278228 is about 1281.4481956875.

The spelling of 2104278228 in words is "two billion, one hundred four million, two hundred seventy-eight thousand, two hundred twenty-eight".