438861228 has 36 divisors (see below), whose sum is σ = 1108843848. Its totient is φ = 135033600.

The previous prime is 438861223. The next prime is 438861233. The reversal of 438861228 is 822168834.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (438861223) and next prime (438861233).

It is a self number, because there is not a number n which added to its sum of digits gives 438861228.

It is not an unprimeable number, because it can be changed into a prime (438861223) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 106173 + ... + 110228.

It is an arithmetic number, because the mean of its divisors is an integer number (30801218).

Almost surely, 2^438861228 is an apocalyptic number.

It is an amenable number.

438861228 is an abundant number, since it is smaller than the sum of its proper divisors (669982620).

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

438861228 is a wasteful number, since it uses less digits than its factorization.

438861228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 216434 (or 216419 counting only the distinct ones).

The product of its digits is 147456, while the sum is 42.

The square root of 438861228 is about 20949.0149649094. The cubic root of 438861228 is about 759.9337592313.

The spelling of 438861228 in words is "four hundred thirty-eight million, eight hundred sixty-one thousand, two hundred twenty-eight".