1313078520 has 128 divisors (see below), whose sum is σ = 4252046400. Its totient is φ = 322473984.

The previous prime is 1313078479. The next prime is 1313078537. The reversal of 1313078520 is 258703131.

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

It is a congruent number.

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, 1018036 + ... + 1019324.

Almost surely, 2^1313078520 is an apocalyptic number.

1313078520 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 1313078520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2126023200).

1313078520 is an abundant number, since it is smaller than the sum of its proper divisors (2938967880).

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

1313078520 is a wasteful number, since it uses less digits than its factorization.

1313078520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1969 (or 1965 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 30.

The square root of 1313078520 is about 36236.4253203872. The cubic root of 1313078520 is about 1095.0406273369.

The spelling of 1313078520 in words is "one billion, three hundred thirteen million, seventy-eight thousand, five hundred twenty".