1276082388 has 144 divisors (see below), whose sum is σ = 3824271360. Its totient is φ = 351086400.

The previous prime is 1276082387. The next prime is 1276082417. The reversal of 1276082388 is 8832806721.

1276082388 is a `hidden beast` number, since 1 + 2 + 7 + 608 + 2 + 38 + 8 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276082387) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2960533 + ... + 2960963.

It is an arithmetic number, because the mean of its divisors is an integer number (26557440).

Almost surely, 2^1276082388 is an apocalyptic number.

1276082388 is a gapful number since it is divisible by the number (18) 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 1276082388, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1912135680).

1276082388 is an abundant number, since it is smaller than the sum of its proper divisors (2548188972).

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

1276082388 is a wasteful number, since it uses less digits than its factorization.

1276082388 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 858 (or 853 counting only the distinct ones).

The product of its (nonzero) digits is 258048, while the sum is 45.

The square root of 1276082388 is about 35722.2953909740. The cubic root of 1276082388 is about 1084.6582026299.

The spelling of 1276082388 in words is "one billion, two hundred seventy-six million, eighty-two thousand, three hundred eighty-eight".