1298278180 has 24 divisors (see below), whose sum is σ = 2784394368. Its totient is φ = 508261728.

The previous prime is 1298278169. The next prime is 1298278183. The reversal of 1298278180 is 818728921.

It is a super-2 number, since 2×1298278180² = 3371052465328224800, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1298278180.

It is not an unprimeable number, because it can be changed into a prime (1298278183) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 689634 + ... + 691513.

It is an arithmetic number, because the mean of its divisors is an integer number (116016432).

Almost surely, 2^1298278180 is an apocalyptic number.

1298278180 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1298278180 is an abundant number, since it is smaller than the sum of its proper divisors (1486116188).

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

1298278180 is a wasteful number, since it uses less digits than its factorization.

1298278180 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1381203 (or 1381201 counting only the distinct ones).

The product of its (nonzero) digits is 129024, while the sum is 46.

The square root of 1298278180 is about 36031.6274958542. The cubic root of 1298278180 is about 1090.9108286126.

The spelling of 1298278180 in words is "one billion, two hundred ninety-eight million, two hundred seventy-eight thousand, one hundred eighty".