1311984740 has 48 divisors (see below), whose sum is σ = 3008202624. Its totient is φ = 476678400.

The previous prime is 1311984731. The next prime is 1311984757. The reversal of 1311984740 is 474891131.

It is a junction number, because it is equal to n+sod(n) for n = 1311984694 and 1311984703.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 401192 + ... + 404448.

It is an arithmetic number, because the mean of its divisors is an integer number (62670888).

Almost surely, 2^1311984740 is an apocalyptic number.

1311984740 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311984740 is an abundant number, since it is smaller than the sum of its proper divisors (1696217884).

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

1311984740 is a wasteful number, since it uses less digits than its factorization.

1311984740 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5108 (or 5106 counting only the distinct ones).

The product of its (nonzero) digits is 24192, while the sum is 38.

The square root of 1311984740 is about 36221.3299038012. The cubic root of 1311984740 is about 1094.7364905978.

The spelling of 1311984740 in words is "one billion, three hundred eleven million, nine hundred eighty-four thousand, seven hundred forty".