1316091388 has 6 divisors (see below), whose sum is σ = 2303159936. Its totient is φ = 658045692.

The previous prime is 1316091367. The next prime is 1316091407. The reversal of 1316091388 is 8831906131.

It is a self number, because there is not a number n which added to its sum of digits gives 1316091388.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 164511420 + ... + 164511427.

Almost surely, 2^1316091388 is an apocalyptic number.

It is an amenable number.

1316091388 is a deficient number, since it is larger than the sum of its proper divisors (987068548).

1316091388 is a wasteful number, since it uses less digits than its factorization.

1316091388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 329022851 (or 329022849 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 40.

The square root of 1316091388 is about 36277.9738684508. The cubic root of 1316091388 is about 1095.8775137506.

The spelling of 1316091388 in words is "one billion, three hundred sixteen million, ninety-one thousand, three hundred eighty-eight".