1278236224 has 56 divisors (see below), whose sum is σ = 2664122688. Its totient is φ = 607326720.

The previous prime is 1278236209. The next prime is 1278236227. The reversal of 1278236224 is 4226328721.

It is not an unprimeable number, because it can be changed into a prime (1278236227) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 228339 + ... + 233869.

Almost surely, 2^1278236224 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 1278236224, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1332061344).

1278236224 is an abundant number, since it is smaller than the sum of its proper divisors (1385886464).

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

1278236224 is a wasteful number, since it uses less digits than its factorization.

1278236224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5723 (or 5713 counting only the distinct ones).

The product of its digits is 64512, while the sum is 37.

The square root of 1278236224 is about 35752.4296237333. The cubic root of 1278236224 is about 1085.2681064956.

The spelling of 1278236224 in words is "one billion, two hundred seventy-eight million, two hundred thirty-six thousand, two hundred twenty-four".