1266313860 has 108 divisors (see below), whose sum is σ = 4468310028. Its totient is φ = 289441152.

The previous prime is 1266313859. The next prime is 1266313883. The reversal of 1266313860 is 683136621.

1266313860 is a `hidden beast` number, since 1 + 266 + 313 + 86 + 0 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 904325184 + 361988676 = 30072^2 + 19026^2 .

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 62967 + ... + 80606.

It is an arithmetic number, because the mean of its divisors is an integer number (41373241).

Almost surely, 2^1266313860 is an apocalyptic number.

1266313860 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1266313860 is an abundant number, since it is smaller than the sum of its proper divisors (3201996168).

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

1266313860 is a wasteful number, since it uses less digits than its factorization.

1266313860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 143602 (or 143590 counting only the distinct ones).

The product of its (nonzero) digits is 31104, while the sum is 36.

The square root of 1266313860 is about 35585.3039891470. The cubic root of 1266313860 is about 1081.8833906378.

The spelling of 1266313860 in words is "one billion, two hundred sixty-six million, three hundred thirteen thousand, eight hundred sixty".