1276729696 has 96 divisors (see below), whose sum is σ = 2837866752. Its totient is φ = 560309760.

The previous prime is 1276729691. The next prime is 1276729703. The reversal of 1276729696 is 6969276721.

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1276729691) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2174715 + ... + 2175301.

It is an arithmetic number, because the mean of its divisors is an integer number (29561112).

Almost surely, 2^1276729696 is an apocalyptic number.

1276729696 is a gapful number since it is divisible by the number (16) 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 1276729696, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1418933376).

1276729696 is an abundant number, since it is smaller than the sum of its proper divisors (1561137056).

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

1276729696 is a wasteful number, since it uses less digits than its factorization.

1276729696 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 812 (or 804 counting only the distinct ones).

The product of its digits is 3429216, while the sum is 55.

The square root of 1276729696 is about 35731.3545223239. The cubic root of 1276729696 is about 1084.8415735613.

The spelling of 1276729696 in words is "one billion, two hundred seventy-six million, seven hundred twenty-nine thousand, six hundred ninety-six".