1316399808 has 28 divisors (see below), whose sum is σ = 3482975000. Its totient is φ = 438799872.

The previous prime is 1316399803. The next prime is 1316399809. The reversal of 1316399808 is 8089936131.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is not an unprimeable number, because it can be changed into a prime (1316399803) 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, 3427933 + ... + 3428316.

Almost surely, 2^1316399808 is an apocalyptic number.

It is an amenable number.

1316399808 is an abundant number, since it is smaller than the sum of its proper divisors (2166575192).

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

1316399808 is an equidigital number, since it uses as much as digits as its factorization.

1316399808 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856264 (or 6856254 counting only the distinct ones).

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 1316399808 is about 36282.2244081038. The cubic root of 1316399808 is about 1095.9631116929.

The spelling of 1316399808 in words is "one billion, three hundred sixteen million, three hundred ninety-nine thousand, eight hundred eight".