1311404032 has 52 divisors (see below), whose sum is σ = 2644185856. Its totient is φ = 650280960.

The previous prime is 1311403993. The next prime is 1311404093. The reversal of 1311404032 is 2304041131.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 518932 + ... + 521452.

It is an arithmetic number, because the mean of its divisors is an integer number (50849728).

Almost surely, 2^1311404032 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1311404032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1322092928).

1311404032 is an abundant number, since it is smaller than the sum of its proper divisors (1332781824).

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

1311404032 is an equidigital number, since it uses as much as digits as its factorization.

1311404032 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2672 (or 2650 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 19.

The square root of 1311404032 is about 36213.3129111381. The cubic root of 1311404032 is about 1094.5749500870.

Adding to 1311404032 its reverse (2304041131), we get a palindrome (3615445163).

The spelling of 1311404032 in words is "one billion, three hundred eleven million, four hundred four thousand, thirty-two".