1316857388 has 24 divisors (see below), whose sum is σ = 2873144064. Its totient is φ = 513061200.

The previous prime is 1316857379. The next prime is 1316857397. The reversal of 1316857388 is 8837586131.

It is an interprime number because it is at equal distance from previous prime (1316857379) and next prime (1316857397).

It is a super-2 number, since 2×1316857388² = 3468226760660365088, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2137448 + ... + 2138063.

It is an arithmetic number, because the mean of its divisors is an integer number (119714336).

Almost surely, 2^1316857388 is an apocalyptic number.

It is an amenable number.

1316857388 is an abundant number, since it is smaller than the sum of its proper divisors (1556286676).

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

1316857388 is a wasteful number, since it uses less digits than its factorization.

1316857388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4275533 (or 4275531 counting only the distinct ones).

The product of its digits is 967680, while the sum is 50.

The square root of 1316857388 is about 36288.5297029240. The cubic root of 1316857388 is about 1096.0900824158.

The spelling of 1316857388 in words is "one billion, three hundred sixteen million, eight hundred fifty-seven thousand, three hundred eighty-eight".