1315999248 has 80 divisors (see below), whose sum is σ = 3531202560. Its totient is φ = 422013568.

The previous prime is 1315999199. The next prime is 1315999249. The reversal of 1315999248 is 8429995131.

It is a self number, because there is not a number n which added to its sum of digits gives 1315999248.

It is not an unprimeable number, because it can be changed into a prime (1315999249) 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, 128161 + ... + 138047.

It is an arithmetic number, because the mean of its divisors is an integer number (44140032).

Almost surely, 2^1315999248 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 1315999248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1765601280).

1315999248 is an abundant number, since it is smaller than the sum of its proper divisors (2215203312).

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

1315999248 is a wasteful number, since it uses less digits than its factorization.

1315999248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10004 (or 9998 counting only the distinct ones).

The product of its digits is 699840, while the sum is 51.

The square root of 1315999248 is about 36276.7039296571. The cubic root of 1315999248 is about 1095.8519389029.

The spelling of 1315999248 in words is "one billion, three hundred fifteen million, nine hundred ninety-nine thousand, two hundred forty-eight".