1278180260 has 48 divisors (see below), whose sum is σ = 3076114944. Its totient is φ = 437021568.

The previous prime is 1278180247. The next prime is 1278180283. The reversal of 1278180260 is 620818721.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is a self number, because there is not a number n which added to its sum of digits gives 1278180260.

It is an unprimeable number.

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 in 15 ways as a sum of consecutive naturals, for example, 38942 + ... + 63818.

It is an arithmetic number, because the mean of its divisors is an integer number (64085728).

Almost surely, 2^1278180260 is an apocalyptic number.

1278180260 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1278180260 is an abundant number, since it is smaller than the sum of its proper divisors (1797934684).

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

1278180260 is a wasteful number, since it uses less digits than its factorization.

1278180260 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25260 (or 25258 counting only the distinct ones).

The product of its (nonzero) digits is 10752, while the sum is 35.

The square root of 1278180260 is about 35751.6469550705. The cubic root of 1278180260 is about 1085.2522677876.

Adding to 1278180260 its reverse (620818721), we get a palindrome (1898998981).

The spelling of 1278180260 in words is "one billion, two hundred seventy-eight million, one hundred eighty thousand, two hundred sixty".