1378678508 has 6 divisors (see below), whose sum is σ = 2412687396. Its totient is φ = 689339252.

The previous prime is 1378678481. The next prime is 1378678517. The reversal of 1378678508 is 8058768731.

It is a super-2 number, since 2×1378678508² = 3801508856842212128, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1378678508.

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 172334810 + ... + 172334817.

It is an arithmetic number, because the mean of its divisors is an integer number (402114566).

Almost surely, 2^1378678508 is an apocalyptic number.

It is an amenable number.

1378678508 is a deficient number, since it is larger than the sum of its proper divisors (1034008888).

1378678508 is a wasteful number, since it uses less digits than its factorization.

1378678508 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 344669631 (or 344669629 counting only the distinct ones).

The product of its (nonzero) digits is 2257920, while the sum is 53.

The square root of 1378678508 is about 37130.5602974154. The cubic root of 1378678508 is about 1112.9807900068.

The spelling of 1378678508 in words is "one billion, three hundred seventy-eight million, six hundred seventy-eight thousand, five hundred eight".