1298855776 has 12 divisors (see below), whose sum is σ = 2557122372. Its totient is φ = 649427872.

The previous prime is 1298855771. The next prime is 1298855809. The reversal of 1298855776 is 6775588921.

It is a self number, because there is not a number n which added to its sum of digits gives 1298855776.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1298855771) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20294590 + ... + 20294653.

It is an arithmetic number, because the mean of its divisors is an integer number (213093531).

Almost surely, 2^1298855776 is an apocalyptic number.

1298855776 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1298855776 is a deficient number, since it is larger than the sum of its proper divisors (1258266596).

1298855776 is an equidigital number, since it uses as much as digits as its factorization.

1298855776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40589253 (or 40589245 counting only the distinct ones).

The product of its digits is 8467200, while the sum is 58.

The square root of 1298855776 is about 36039.6417296288. The cubic root of 1298855776 is about 1091.0725844726.

The spelling of 1298855776 in words is "one billion, two hundred ninety-eight million, eight hundred fifty-five thousand, seven hundred seventy-six".