1315857480 has 128 divisors (see below), whose sum is σ = 4520033280. Its totient is φ = 300199680.

The previous prime is 1315857479. The next prime is 1315857493. The reversal of 1315857480 is 847585131.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 579307 + ... + 581573.

It is an arithmetic number, because the mean of its divisors is an integer number (35312760).

Almost surely, 2^1315857480 is an apocalyptic number.

1315857480 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 1315857480, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2260016640).

1315857480 is an abundant number, since it is smaller than the sum of its proper divisors (3204175800).

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

1315857480 is a wasteful number, since it uses less digits than its factorization.

1315857480 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2979 (or 2975 counting only the distinct ones).

The product of its (nonzero) digits is 134400, while the sum is 42.

The square root of 1315857480 is about 36274.7498957608. The cubic root of 1315857480 is about 1095.8125867232.

The spelling of 1315857480 in words is "one billion, three hundred fifteen million, eight hundred fifty-seven thousand, four hundred eighty".