1378967940 has 144 divisors (see below), whose sum is σ = 5032110720. Its totient is φ = 298598400.

The previous prime is 1378967897. The next prime is 1378967977. The reversal of 1378967940 is 497698731.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 4861 + ... + 52740.

Almost surely, 2^1378967940 is an apocalyptic number.

1378967940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1378967940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2516055360).

1378967940 is an abundant number, since it is smaller than the sum of its proper divisors (3653142780).

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

1378967940 is a wasteful number, since it uses less digits than its factorization.

1378967940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57642 (or 57637 counting only the distinct ones).

The product of its (nonzero) digits is 2286144, while the sum is 54.

The square root of 1378967940 is about 37134.4575832205. The cubic root of 1378967940 is about 1113.0586688632.

The spelling of 1378967940 in words is "one billion, three hundred seventy-eight million, nine hundred sixty-seven thousand, nine hundred forty".