1311006404 has 12 divisors (see below), whose sum is σ = 2296426944. Its totient is φ = 654884424.

The previous prime is 1311006341. The next prime is 1311006407. The reversal of 1311006404 is 4046001131.

It is a super-2 number, since 2×1311006404² = 3437475582658022432, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1311006407) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 149912 + ... + 158415.

It is an arithmetic number, because the mean of its divisors is an integer number (191368912).

Almost surely, 2^1311006404 is an apocalyptic number.

It is an amenable number.

1311006404 is a deficient number, since it is larger than the sum of its proper divisors (985420540).

1311006404 is a wasteful number, since it uses less digits than its factorization.

1311006404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 309394 (or 309392 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 1311006404 is about 36207.8224145004. The cubic root of 1311006404 is about 1094.4643109975.

Adding to 1311006404 its reverse (4046001131), we get a palindrome (5357007535).

The spelling of 1311006404 in words is "one billion, three hundred eleven million, six thousand, four hundred four".