1378972984 has 8 divisors (see below), whose sum is σ = 2585574360. Its totient is φ = 689486488.

The previous prime is 1378972979. The next prime is 1378973021. The reversal of 1378972984 is 4892798731.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 86185804 + ... + 86185819.

It is an arithmetic number, because the mean of its divisors is an integer number (323196795).

Almost surely, 2^1378972984 is an apocalyptic number.

It is an amenable number.

1378972984 is a deficient number, since it is larger than the sum of its proper divisors (1206601376).

1378972984 is a wasteful number, since it uses less digits than its factorization.

1378972984 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 172371629 (or 172371625 counting only the distinct ones).

The product of its digits is 6096384, while the sum is 58.

The square root of 1378972984 is about 37134.5254985169. The cubic root of 1378972984 is about 1113.0600259798.

The spelling of 1378972984 in words is "one billion, three hundred seventy-eight million, nine hundred seventy-two thousand, nine hundred eighty-four".