1320040311 has 32 divisors (see below), whose sum is σ = 1868203008. Its totient is φ = 827397120.

The previous prime is 1320040303. The next prime is 1320040369. The reversal of 1320040311 is 1130400231.

It is not a de Polignac number, because 1320040311 - 2³ = 1320040303 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320040411) 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, 1117141 + ... + 1118321.

It is an arithmetic number, because the mean of its divisors is an integer number (58381344).

Almost surely, 2^1320040311 is an apocalyptic number.

1320040311 is a deficient number, since it is larger than the sum of its proper divisors (548162697).

1320040311 is a wasteful number, since it uses less digits than its factorization.

1320040311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1471.

The product of its (nonzero) digits is 72, while the sum is 15.

The square root of 1320040311 is about 36332.3590068137. The cubic root of 1320040311 is about 1096.9724769404.

Adding to 1320040311 its reverse (1130400231), we get a palindrome (2450440542).

The spelling of 1320040311 in words is "one billion, three hundred twenty million, forty thousand, three hundred eleven".