1319485728 has 96 divisors (see below), whose sum is σ = 3793692672. Its totient is φ = 398240000.

The previous prime is 1319485697. The next prime is 1319485733. The reversal of 1319485728 is 8275849131.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 275353 + ... + 280103.

It is an arithmetic number, because the mean of its divisors is an integer number (39517632).

Almost surely, 2^1319485728 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 1319485728, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1896846336).

1319485728 is an abundant number, since it is smaller than the sum of its proper divisors (2474206944).

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

1319485728 is a wasteful number, since it uses less digits than its factorization.

1319485728 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5038 (or 5030 counting only the distinct ones).

The product of its digits is 483840, while the sum is 48.

The square root of 1319485728 is about 36324.7261242256. The cubic root of 1319485728 is about 1096.8188332730.

The spelling of 1319485728 in words is "one billion, three hundred nineteen million, four hundred eighty-five thousand, seven hundred twenty-eight".