1378988404 has 6 divisors (see below), whose sum is σ = 2413229714. Its totient is φ = 689494200.

The previous prime is 1378988393. The next prime is 1378988423. The reversal of 1378988404 is 4048898731.

It can be written as a sum of positive squares in only one way, i.e., 1364563600 + 14424804 = 36940^2 + 3798^2 .

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, 172373547 + ... + 172373554.

Almost surely, 2^1378988404 is an apocalyptic number.

It is an amenable number.

1378988404 is a deficient number, since it is larger than the sum of its proper divisors (1034241310).

1378988404 is a wasteful number, since it uses less digits than its factorization.

1378988404 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 344747105 (or 344747103 counting only the distinct ones).

The product of its (nonzero) digits is 1548288, while the sum is 52.

The square root of 1378988404 is about 37134.7331214323. The cubic root of 1378988404 is about 1113.0641747973.

The spelling of 1378988404 in words is "one billion, three hundred seventy-eight million, nine hundred eighty-eight thousand, four hundred four".