1320440511 has 32 divisors (see below), whose sum is σ = 2082608640. Its totient is φ = 736331904.

The previous prime is 1320440479. The next prime is 1320440593. The reversal of 1320440511 is 1150440231.

It is not a de Polignac number, because 1320440511 - 2⁵ = 1320440479 is a prime.

It is a super-2 number, since 2×1320440511² = 3487126286179882242, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1320440411) 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, 21696 + ... + 55781.

It is an arithmetic number, because the mean of its divisors is an integer number (65081520).

Almost surely, 2^1320440511 is an apocalyptic number.

1320440511 is a deficient number, since it is larger than the sum of its proper divisors (762168129).

1320440511 is a wasteful number, since it uses less digits than its factorization.

1320440511 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77535.

The product of its (nonzero) digits is 480, while the sum is 21.

The square root of 1320440511 is about 36337.8660765874. The cubic root of 1320440511 is about 1097.0833230572.

Adding to 1320440511 its reverse (1150440231), we get a palindrome (2470880742).

The spelling of 1320440511 in words is "one billion, three hundred twenty million, four hundred forty thousand, five hundred eleven".