1313520404 has 24 divisors (see below), whose sum is σ = 2643782400. Its totient is φ = 559349856.

The previous prime is 1313520391. The next prime is 1313520431. The reversal of 1313520404 is 4040253131.

It is a self number, because there is not a number n which added to its sum of digits gives 1313520404.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 145004 + ... + 153795.

It is an arithmetic number, because the mean of its divisors is an integer number (110157600).

Almost surely, 2^1313520404 is an apocalyptic number.

1313520404 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

1313520404 is an abundant number, since it is smaller than the sum of its proper divisors (1330261996).

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

1313520404 is a wasteful number, since it uses less digits than its factorization.

1313520404 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298967 (or 298965 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 23.

The square root of 1313520404 is about 36242.5220424848. The cubic root of 1313520404 is about 1095.1634498124.

Adding to 1313520404 its reverse (4040253131), we get a palindrome (5353773535).

The spelling of 1313520404 in words is "one billion, three hundred thirteen million, five hundred twenty thousand, four hundred four".