1313655880 has 64 divisors (see below), whose sum is σ = 3023717040. Its totient is φ = 513457152.

The previous prime is 1313655829. The next prime is 1313655899. The reversal of 1313655880 is 885563131.

It can be written as a sum of positive squares in 8 ways, for example, as 686754436 + 626901444 = 26206^2 + 25038^2 .

It is a Harshad number since it is a multiple of its sum of digits (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586122 + ... + 588358.

Almost surely, 2^1313655880 is an apocalyptic number.

1313655880 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 1313655880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1511858520).

1313655880 is an abundant number, since it is smaller than the sum of its proper divisors (1710061160).

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

1313655880 is a wasteful number, since it uses less digits than its factorization.

1313655880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2578 (or 2574 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 1313655880 is about 36244.3910143349. The cubic root of 1313655880 is about 1095.2011001000.

The spelling of 1313655880 in words is "one billion, three hundred thirteen million, six hundred fifty-five thousand, eight hundred eighty".