1387970678 has 16 divisors (see below), whose sum is σ = 2246019840. Its totient is φ = 640838016.

The previous prime is 1387970669. The next prime is 1387970687. The reversal of 1387970678 is 8760797831.

It is an interprime number because it is at equal distance from previous prime (1387970669) and next prime (1387970687).

It is a congruent number.

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, 383318 + ... + 386921.

It is an arithmetic number, because the mean of its divisors is an integer number (140376240).

Almost surely, 2^1387970678 is an apocalyptic number.

1387970678 is a deficient number, since it is larger than the sum of its proper divisors (858049162).

1387970678 is a wasteful number, since it uses less digits than its factorization.

1387970678 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 770311.

The product of its (nonzero) digits is 3556224, while the sum is 56.

The square root of 1387970678 is about 37255.4784964574. The cubic root of 1387970678 is about 1115.4756570177.

The spelling of 1387970678 in words is "one billion, three hundred eighty-seven million, nine hundred seventy thousand, six hundred seventy-eight".