1439198728 has 64 divisors (see below), whose sum is σ = 3030048000. Its totient is φ = 635174400.

The previous prime is 1439198701. The next prime is 1439198737. The reversal of 1439198728 is 8278919341.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 861478 + ... + 863146.

It is an arithmetic number, because the mean of its divisors is an integer number (47344500).

Almost surely, 2^1439198728 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 1439198728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1515024000).

1439198728 is an abundant number, since it is smaller than the sum of its proper divisors (1590849272).

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

1439198728 is a wasteful number, since it uses less digits than its factorization.

1439198728 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1966 (or 1962 counting only the distinct ones).

The product of its digits is 870912, while the sum is 52.

The square root of 1439198728 is about 37936.7727673296. The cubic root of 1439198728 is about 1129.0337441793.

The spelling of 1439198728 in words is "one billion, four hundred thirty-nine million, one hundred ninety-eight thousand, seven hundred twenty-eight".