1315663140 has 96 divisors (see below), whose sum is σ = 4044668544. Its totient is φ = 316892160.

The previous prime is 1315663109. The next prime is 1315663147. The reversal of 1315663140 is 413665131.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a junction number, because it is equal to n+sod(n) for n = 1315663098 and 1315663107.

It is not an unprimeable number, because it can be changed into a prime (1315663147) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 97272 + ... + 109968.

It is an arithmetic number, because the mean of its divisors is an integer number (42131964).

Almost surely, 2^1315663140 is an apocalyptic number.

1315663140 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 1315663140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2022334272).

1315663140 is an abundant number, since it is smaller than the sum of its proper divisors (2729005404).

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

1315663140 is a wasteful number, since it uses less digits than its factorization.

1315663140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12877 (or 12875 counting only the distinct ones).

The product of its (nonzero) digits is 6480, while the sum is 30.

The square root of 1315663140 is about 36272.0710740371. The cubic root of 1315663140 is about 1095.7586369334.

The spelling of 1315663140 in words is "one billion, three hundred fifteen million, six hundred sixty-three thousand, one hundred forty".