1311840492 has 12 divisors (see below), whose sum is σ = 3060961176. Its totient is φ = 437280160.

The previous prime is 1311840487. The next prime is 1311840511. The reversal of 1311840492 is 2940481131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (12).

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, 54660009 + ... + 54660032.

It is an arithmetic number, because the mean of its divisors is an integer number (255080098).

Almost surely, 2^1311840492 is an apocalyptic number.

1311840492 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

1311840492 is an abundant number, since it is smaller than the sum of its proper divisors (1749120684).

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

1311840492 is a wasteful number, since it uses less digits than its factorization.

1311840492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 109320048 (or 109320046 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 33.

The square root of 1311840492 is about 36219.3386466401. The cubic root of 1311840492 is about 1094.6963683484.

The spelling of 1311840492 in words is "one billion, three hundred eleven million, eight hundred forty thousand, four hundred ninety-two".