1316191240 has 128 divisors (see below), whose sum is σ = 3663072000. Its totient is φ = 414471168.

The previous prime is 1316191231. The next prime is 1316191309. The reversal of 1316191240 is 421916131.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is a junction number, because it is equal to n+sod(n) for n = 1316191199 and 1316191208.

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, 832771 + ... + 834349.

It is an arithmetic number, because the mean of its divisors is an integer number (28617750).

Almost surely, 2^1316191240 is an apocalyptic number.

1316191240 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 1316191240, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1831536000).

1316191240 is an abundant number, since it is smaller than the sum of its proper divisors (2346880760).

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

1316191240 is a wasteful number, since it uses less digits than its factorization.

1316191240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1839 (or 1835 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 28.

The square root of 1316191240 is about 36279.3500493049. The cubic root of 1316191240 is about 1095.9052278327.

It can be divided in two parts, 13161 and 91240, that added together give a palindrome (104401).

The spelling of 1316191240 in words is "one billion, three hundred sixteen million, one hundred ninety-one thousand, two hundred forty".