1311538704 has 160 divisors (see below), whose sum is σ = 4059859200. Its totient is φ = 364428288.

The previous prime is 1311538703. The next prime is 1311538721. The reversal of 1311538704 is 4078351131.

It is a hoax number, since the sum of its digits (33) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1311538703) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 608092 + ... + 610244.

It is an arithmetic number, because the mean of its divisors is an integer number (25374120).

Almost surely, 2^1311538704 is an apocalyptic number.

1311538704 is a gapful number since it is divisible by the number (14) 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 1311538704, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2029929600).

1311538704 is an abundant number, since it is smaller than the sum of its proper divisors (2748320496).

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

1311538704 is a wasteful number, since it uses less digits than its factorization.

1311538704 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2222 (or 2202 counting only the distinct ones).

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 1311538704 is about 36215.1722900775. The cubic root of 1311538704 is about 1094.6124171957.

Adding to 1311538704 its reverse (4078351131), we get a palindrome (5389889835).

The spelling of 1311538704 in words is "one billion, three hundred eleven million, five hundred thirty-eight thousand, seven hundred four".