1278118470 has 64 divisors (see below), whose sum is σ = 3140176896. Its totient is φ = 332789760.

The previous prime is 1278118469. The next prime is 1278118477. The reversal of 1278118470 is 748118721.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1278118477) 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 31 ways as a sum of consecutive naturals, for example, 812785 + ... + 814355.

It is an arithmetic number, because the mean of its divisors is an integer number (49065264).

Almost surely, 2^1278118470 is an apocalyptic number.

1278118470 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278118470, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1570088448).

1278118470 is an abundant number, since it is smaller than the sum of its proper divisors (1862058426).

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

1278118470 is a wasteful number, since it uses less digits than its factorization.

1278118470 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2205.

The product of its (nonzero) digits is 25088, while the sum is 39.

The square root of 1278118470 is about 35750.7827886328. The cubic root of 1278118470 is about 1085.2347796914.

The spelling of 1278118470 in words is "one billion, two hundred seventy-eight million, one hundred eighteen thousand, four hundred seventy".