1311378760 has 32 divisors (see below), whose sum is σ = 2953376640. Its totient is φ = 524058304.

The previous prime is 1311378743. The next prime is 1311378821. The reversal of 1311378760 is 678731131.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 29259 + ... + 58981.

It is an arithmetic number, because the mean of its divisors is an integer number (92293020).

Almost surely, 2^1311378760 is an apocalyptic number.

1311378760 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1311378760 is an abundant number, since it is smaller than the sum of its proper divisors (1641997880).

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

1311378760 is a wasteful number, since it uses less digits than its factorization.

1311378760 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30837 (or 30833 counting only the distinct ones).

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 1311378760 is about 36212.9639770069. The cubic root of 1311378760 is about 1094.5679188759.

The spelling of 1311378760 in words is "one billion, three hundred eleven million, three hundred seventy-eight thousand, seven hundred sixty".