1276708140 has 72 divisors (see below), whose sum is σ = 3903244800. Its totient is φ = 337768704.

The previous prime is 1276708129. The next prime is 1276708183. The reversal of 1276708140 is 418076721.

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

It is a junction number, because it is equal to n+sod(n) for n = 1276708095 and 1276708104.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 5065 + ... + 50784.

Almost surely, 2^1276708140 is an apocalyptic number.

1276708140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1276708140, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1951622400).

1276708140 is an abundant number, since it is smaller than the sum of its proper divisors (2626536660).

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

1276708140 is a wasteful number, since it uses less digits than its factorization.

1276708140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55991 (or 55986 counting only the distinct ones).

The product of its (nonzero) digits is 18816, while the sum is 36.

The square root of 1276708140 is about 35731.0528812124. The cubic root of 1276708140 is about 1084.8354681247.

The spelling of 1276708140 in words is "one billion, two hundred seventy-six million, seven hundred eight thousand, one hundred forty".