1228438784 has 36 divisors (see below), whose sum is σ = 2456479200. Its totient is φ = 613117440.

The previous prime is 1228438781. The next prime is 1228438789. The reversal of 1228438784 is 4878348221.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228438781) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149339 + ... + 157349.

Almost surely, 2^1228438784 is an apocalyptic number.

It is an amenable number.

1228438784 is a deficient number, since it is larger than the sum of its proper divisors (1228040416).

1228438784 is an frugal number, since it uses more digits than its factorization.

1228438784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8626 (or 8612 counting only the distinct ones).

The product of its digits is 688128, while the sum is 47.

The square root of 1228438784 is about 35049.0910581145. The cubic root of 1228438784 is about 1070.9877576356.

The spelling of 1228438784 in words is "one billion, two hundred twenty-eight million, four hundred thirty-eight thousand, seven hundred eighty-four".