1283378944 has 18 divisors (see below), whose sum is σ = 2561745200. Its totient is φ = 641689344.

The previous prime is 1283378927. The next prime is 1283378947. The reversal of 1283378944 is 4498733821.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1283378947) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2506344 + ... + 2506855.

Almost surely, 2^1283378944 is an apocalyptic number.

It is an amenable number.

1283378944 is a deficient number, since it is larger than the sum of its proper divisors (1278366256).

1283378944 is an frugal number, since it uses more digits than its factorization.

1283378944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5013215 (or 5013201 counting only the distinct ones).

The product of its digits is 1161216, while the sum is 49.

The square root of 1283378944 is about 35824.2786947623. The cubic root of 1283378944 is about 1086.7216097947.

The spelling of 1283378944 in words is "one billion, two hundred eighty-three million, three hundred seventy-eight thousand, nine hundred forty-four".