1315685280 has 432 divisors, whose sum is σ = 5236195104. Its totient is φ = 276756480.

The previous prime is 1315685251. The next prime is 1315685317. The reversal of 1315685280 is 825865131.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 3974715 + ... + 3975045.

It is an arithmetic number, because the mean of its divisors is an integer number (12120822).

Almost surely, 2^1315685280 is an apocalyptic number.

1315685280 is a gapful number since it is divisible by the number (10) 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 1315685280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2618097552).

1315685280 is an abundant number, since it is smaller than the sum of its proper divisors (3920509824).

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

1315685280 is a wasteful number, since it uses less digits than its factorization.

1315685280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 389 (or 361 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 39.

The square root of 1315685280 is about 36272.3762662443. The cubic root of 1315685280 is about 1095.7647833801.

The spelling of 1315685280 in words is "one billion, three hundred fifteen million, six hundred eighty-five thousand, two hundred eighty".