1316987760 has 80 divisors (see below), whose sum is σ = 4453822080. Its totient is φ = 319269120.

The previous prime is 1316987753. The next prime is 1316987839. The reversal of 1316987760 is 677896131.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (80).

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

It is a congruent number.

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, 246790 + ... + 252069.

It is an arithmetic number, because the mean of its divisors is an integer number (55672776).

Almost surely, 2^1316987760 is an apocalyptic number.

1316987760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1316987760 is an abundant number, since it is smaller than the sum of its proper divisors (3136834320).

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

1316987760 is a wasteful number, since it uses less digits than its factorization.

1316987760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498886 (or 498880 counting only the distinct ones).

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1316987760 is about 36290.3259836558. The cubic root of 1316987760 is about 1096.1262530602.

The spelling of 1316987760 in words is "one billion, three hundred sixteen million, nine hundred eighty-seven thousand, seven hundred sixty".