1388518378 has 16 divisors (see below), whose sum is σ = 2271386880. Its totient is φ = 632741616.

The previous prime is 1388518361. The next prime is 1388518381. The reversal of 1388518378 is 8738158831.

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, 335950 + ... + 340057.

It is an arithmetic number, because the mean of its divisors is an integer number (141961680).

Almost surely, 2^1388518378 is an apocalyptic number.

1388518378 is a deficient number, since it is larger than the sum of its proper divisors (882868502).

1388518378 is a wasteful number, since it uses less digits than its factorization.

1388518378 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676101.

The product of its digits is 1290240, while the sum is 52.

The square root of 1388518378 is about 37262.8283682278. The cubic root of 1388518378 is about 1115.6223617678.

The spelling of 1388518378 in words is "one billion, three hundred eighty-eight million, five hundred eighteen thousand, three hundred seventy-eight".