1315895540 has 144 divisors (see below), whose sum is σ = 3152265984. Its totient is φ = 459648000.

The previous prime is 1315895459. The next prime is 1315895543. The reversal of 1315895540 is 455985131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1315895543) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8714465 + ... + 8714615.

It is an arithmetic number, because the mean of its divisors is an integer number (21890736).

Almost surely, 2^1315895540 is an apocalyptic number.

1315895540 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 1315895540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1576132992).

1315895540 is an abundant number, since it is smaller than the sum of its proper divisors (1836370444).

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

1315895540 is a wasteful number, since it uses less digits than its factorization.

1315895540 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 286 (or 265 counting only the distinct ones).

The product of its (nonzero) digits is 108000, while the sum is 41.

The square root of 1315895540 is about 36275.2744993060. The cubic root of 1315895540 is about 1095.8231517541.

The spelling of 1315895540 in words is "one billion, three hundred fifteen million, eight hundred ninety-five thousand, five hundred forty".