1276808830 has 16 divisors (see below), whose sum is σ = 2507188464. Its totient is φ = 464294080.

The previous prime is 1276808803. The next prime is 1276808831. The reversal of 1276808830 is 388086721.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276808831) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5803567 + ... + 5803786.

It is an arithmetic number, because the mean of its divisors is an integer number (156699279).

Almost surely, 2^1276808830 is an apocalyptic number.

1276808830 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1276808830 is a deficient number, since it is larger than the sum of its proper divisors (1230379634).

1276808830 is a wasteful number, since it uses less digits than its factorization.

1276808830 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11607371.

The product of its (nonzero) digits is 129024, while the sum is 43.

The square root of 1276808830 is about 35732.4618519351. The cubic root of 1276808830 is about 1084.8639865747.

The spelling of 1276808830 in words is "one billion, two hundred seventy-six million, eight hundred eight thousand, eight hundred thirty".