1227489984 has 448 divisors, whose sum is σ = 4470400000. Its totient is φ = 329204736.

The previous prime is 1227489971. The next prime is 1227490009. The reversal of 1227489984 is 4899847221.

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is a self number, because there is not a number n which added to its sum of digits gives 1227489984.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 11261322 + ... + 11261430.

Almost surely, 2^1227489984 is an apocalyptic number.

1227489984 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1227489984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2235200000).

1227489984 is an abundant number, since it is smaller than the sum of its proper divisors (3242910016).

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

1227489984 is a wasteful number, since it uses less digits than its factorization.

1227489984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 170 (or 140 counting only the distinct ones).

The product of its digits is 2322432, while the sum is 54.

The square root of 1227489984 is about 35035.5531424866. The cubic root of 1227489984 is about 1070.7119563712.

The spelling of 1227489984 in words is "one billion, two hundred twenty-seven million, four hundred eighty-nine thousand, nine hundred eighty-four".