1276386228 has 48 divisors (see below), whose sum is σ = 3563703360. Its totient is φ = 392733792.

The previous prime is 1276386203. The next prime is 1276386233. The reversal of 1276386228 is 8226836721.

1276386228 is a `hidden beast` number, since 1 + 2 + 7 + 638 + 6 + 2 + 2 + 8 = 666.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 453150 + ... + 455957.

It is an arithmetic number, because the mean of its divisors is an integer number (74243820).

Almost surely, 2^1276386228 is an apocalyptic number.

1276386228 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

It is an amenable number.

1276386228 is an abundant number, since it is smaller than the sum of its proper divisors (2287317132).

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

1276386228 is a wasteful number, since it uses less digits than its factorization.

1276386228 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 909133 (or 909125 counting only the distinct ones).

The product of its digits is 387072, while the sum is 45.

The square root of 1276386228 is about 35726.5479440709. The cubic root of 1276386228 is about 1084.7442828596.

The spelling of 1276386228 in words is "one billion, two hundred seventy-six million, three hundred eighty-six thousand, two hundred twenty-eight".