1228855984 has 20 divisors (see below), whose sum is σ = 2431567584. Its totient is φ = 601354688.

The previous prime is 1228855963. The next prime is 1228855987. The reversal of 1228855984 is 4895588221.

It is not an unprimeable number, because it can be changed into a prime (1228855987) 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, 816307 + ... + 817810.

Almost surely, 2^1228855984 is an apocalyptic number.

It is an amenable number.

1228855984 is a deficient number, since it is larger than the sum of its proper divisors (1202711600).

1228855984 is a wasteful number, since it uses less digits than its factorization.

1228855984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1634172 (or 1634166 counting only the distinct ones).

The product of its digits is 1843200, while the sum is 52.

The square root of 1228855984 is about 35055.0422050809. The cubic root of 1228855984 is about 1071.1089861754.

The spelling of 1228855984 in words is "one billion, two hundred twenty-eight million, eight hundred fifty-five thousand, nine hundred eighty-four".