1378417738 has 16 divisors (see below), whose sum is σ = 2271078720. Its totient is φ = 624545856.

The previous prime is 1378417723. The next prime is 1378417751. The reversal of 1378417738 is 8377148731.

It is a junction number, because it is equal to n+sod(n) for n = 1378417691 and 1378417700.

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, 787695 + ... + 789442.

It is an arithmetic number, because the mean of its divisors is an integer number (141942420).

Almost surely, 2^1378417738 is an apocalyptic number.

1378417738 is a deficient number, since it is larger than the sum of its proper divisors (892660982).

1378417738 is a wasteful number, since it uses less digits than its factorization.

1378417738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1577181.

The product of its digits is 790272, while the sum is 49.

The square root of 1378417738 is about 37127.0486034104. The cubic root of 1378417738 is about 1112.9106140377.

The spelling of 1378417738 in words is "one billion, three hundred seventy-eight million, four hundred seventeen thousand, seven hundred thirty-eight".