1438889984 has 96 divisors (see below), whose sum is σ = 3402453600. Its totient is φ = 595230720.

The previous prime is 1438889981. The next prime is 1438889993. The reversal of 1438889984 is 4899888341.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1438889981) 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, 414014 + ... + 417474.

It is an arithmetic number, because the mean of its divisors is an integer number (35442225).

Almost surely, 2^1438889984 is an apocalyptic number.

1438889984 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 1438889984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1701226800).

1438889984 is an abundant number, since it is smaller than the sum of its proper divisors (1963563616).

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

1438889984 is an equidigital number, since it uses as much as digits as its factorization.

1438889984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3519 (or 3499 counting only the distinct ones).

The product of its digits is 15925248, while the sum is 62.

The square root of 1438889984 is about 37932.7033573933. The cubic root of 1438889984 is about 1128.9530031120.

The spelling of 1438889984 in words is "one billion, four hundred thirty-eight million, eight hundred eighty-nine thousand, nine hundred eighty-four".