1313578772 has 24 divisors (see below), whose sum is σ = 2516324832. Its totient is φ = 595037600.

The previous prime is 1313578771. The next prime is 1313578801. The reversal of 1313578772 is 2778753131.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1313578771) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38054 + ... + 63837.

It is an arithmetic number, because the mean of its divisors is an integer number (104846868).

Almost surely, 2^1313578772 is an apocalyptic number.

It is an amenable number.

1313578772 is a deficient number, since it is larger than the sum of its proper divisors (1202746060).

1313578772 is a wasteful number, since it uses less digits than its factorization.

1313578772 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102199 (or 102197 counting only the distinct ones).

The product of its digits is 246960, while the sum is 44.

The square root of 1313578772 is about 36243.3272755138. The cubic root of 1313578772 is about 1095.1796712464.

It can be divided in two parts, 1313 and 578772, that added together give a palindrome (580085).

The spelling of 1313578772 in words is "one billion, three hundred thirteen million, five hundred seventy-eight thousand, seven hundred seventy-two".