1228684984 has 8 divisors (see below), whose sum is σ = 2303784360. Its totient is φ = 614342488.

The previous prime is 1228684981. The next prime is 1228684987. The reversal of 1228684984 is 4894868221.

It is an interprime number because it is at equal distance from previous prime (1228684981) and next prime (1228684987).

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1228684981) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76792804 + ... + 76792819.

It is an arithmetic number, because the mean of its divisors is an integer number (287973045).

Almost surely, 2^1228684984 is an apocalyptic number.

It is an amenable number.

1228684984 is a deficient number, since it is larger than the sum of its proper divisors (1075099376).

1228684984 is a wasteful number, since it uses less digits than its factorization.

1228684984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 153585629 (or 153585625 counting only the distinct ones).

The product of its digits is 1769472, while the sum is 52.

The square root of 1228684984 is about 35052.6030987714. The cubic root of 1228684984 is about 1071.0593009029.

The spelling of 1228684984 in words is "one billion, two hundred twenty-eight million, six hundred eighty-four thousand, nine hundred eighty-four".