1238871228 has 144 divisors (see below), whose sum is σ = 3469939200. Its totient is φ = 336942720.

The previous prime is 1238871223. The next prime is 1238871229. The reversal of 1238871228 is 8221788321.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 1238871228.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1238871223) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8314498 + ... + 8314646.

It is an arithmetic number, because the mean of its divisors is an integer number (24096800).

Almost surely, 2^1238871228 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 1238871228, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1734969600).

1238871228 is an abundant number, since it is smaller than the sum of its proper divisors (2231067972).

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

1238871228 is a wasteful number, since it uses less digits than its factorization.

1238871228 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328 (or 295 counting only the distinct ones).

The product of its digits is 86016, while the sum is 42.

The square root of 1238871228 is about 35197.6025888128. The cubic root of 1238871228 is about 1074.0109823442.

The spelling of 1238871228 in words is "one billion, two hundred thirty-eight million, eight hundred seventy-one thousand, two hundred twenty-eight".