1278418944 has 112 divisors (see below), whose sum is σ = 3719596320. Its totient is φ = 387317760.

The previous prime is 1278418937. The next prime is 1278418961. The reversal of 1278418944 is 4498148721.

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a junction number, because it is equal to n+sod(n) for n = 1278418893 and 1278418902.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 267972 + ... + 272700.

Almost surely, 2^1278418944 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1278418944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1859798160).

1278418944 is an abundant number, since it is smaller than the sum of its proper divisors (2441177376).

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

1278418944 is an equidigital number, since it uses as much as digits as its factorization.

1278418944 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4769 (or 4745 counting only the distinct ones).

The product of its digits is 516096, while the sum is 48.

The square root of 1278418944 is about 35754.9848832299. The cubic root of 1278418944 is about 1085.3198159623.

The spelling of 1278418944 in words is "one billion, two hundred seventy-eight million, four hundred eighteen thousand, nine hundred forty-four".