1316919720 has 64 divisors (see below), whose sum is σ = 4042653120. Its totient is φ = 343010304.

The previous prime is 1316919719. The next prime is 1316919731. The reversal of 1316919720 is 279196131.

It is a happy number.

It is a hoax number, since the sum of its digits (39) coincides with the sum of the digits of its distinct prime factors.

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 15 ways as a sum of consecutive naturals, for example, 122449 + ... + 132768.

It is an arithmetic number, because the mean of its divisors is an integer number (63166455).

Almost surely, 2^1316919720 is an apocalyptic number.

1316919720 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316919720 is an abundant number, since it is smaller than the sum of its proper divisors (2725733400).

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

1316919720 is a wasteful number, since it uses less digits than its factorization.

1316919720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 255274 (or 255270 counting only the distinct ones).

The product of its (nonzero) digits is 20412, while the sum is 39.

The square root of 1316919720 is about 36289.3885316355. The cubic root of 1316919720 is about 1096.1073762169.

The spelling of 1316919720 in words is "one billion, three hundred sixteen million, nine hundred nineteen thousand, seven hundred twenty".