1378678514 has 8 divisors (see below), whose sum is σ = 2072544348. Its totient is φ = 687830400.

The previous prime is 1378678481. The next prime is 1378678517. The reversal of 1378678514 is 4158768731.

It can be written as a sum of positive squares in 2 ways, for example, as 1333345225 + 45333289 = 36515^2 + 6733^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (1378678517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 753287 + ... + 755114.

Almost surely, 2^1378678514 is an apocalyptic number.

1378678514 is a deficient number, since it is larger than the sum of its proper divisors (693865834).

1378678514 is a wasteful number, since it uses less digits than its factorization.

1378678514 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1508860.

The product of its digits is 1128960, while the sum is 50.

The square root of 1378678514 is about 37130.5603782114. The cubic root of 1378678514 is about 1112.9807916214.

The spelling of 1378678514 in words is "one billion, three hundred seventy-eight million, six hundred seventy-eight thousand, five hundred fourteen".