1438737984 has 112 divisors (see below), whose sum is σ = 4246107840. Its totient is φ = 477711360.

The previous prime is 1438737983. The next prime is 1438737997. The reversal of 1438737984 is 4897378341.

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

It is a self number, because there is not a number n which added to its sum of digits gives 1438737984.

It is not an unprimeable number, because it can be changed into a prime (1438737983) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 484087 + ... + 487049.

Almost surely, 2^1438737984 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1438737984, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2123053920).

1438737984 is an abundant number, since it is smaller than the sum of its proper divisors (2807369856).

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

1438737984 is a wasteful number, since it uses less digits than its factorization.

1438737984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3265 (or 3249 counting only the distinct ones).

The product of its digits is 4064256, while the sum is 54.

The square root of 1438737984 is about 37930.6997562660. The cubic root of 1438737984 is about 1128.9132486483.

The spelling of 1438737984 in words is "one billion, four hundred thirty-eight million, seven hundred thirty-seven thousand, nine hundred eighty-four".