440646228 has 72 divisors (see below), whose sum is σ = 1217536320. Its totient is φ = 133263360.

The previous prime is 440646221. The next prime is 440646247. The reversal of 440646228 is 822646044.

It is a happy number.

440646228 is a `hidden beast` number, since 4 + 4 + 0 + 646 + 2 + 2 + 8 = 666.

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 = 440646192 and 440646201.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (440646221) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303801 + ... + 305247.

Almost surely, 2^440646228 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 440646228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (608768160).

440646228 is an abundant number, since it is smaller than the sum of its proper divisors (776890092).

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

440646228 is a wasteful number, since it uses less digits than its factorization.

440646228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2237 (or 2232 counting only the distinct ones).

The product of its (nonzero) digits is 73728, while the sum is 36.

The square root of 440646228 is about 20991.5751671951. The cubic root of 440646228 is about 760.9626697579.

The spelling of 440646228 in words is "four hundred forty million, six hundred forty-six thousand, two hundred twenty-eight".