388681678 has 16 divisors (see below), whose sum is σ = 726885504. Its totient is φ = 151434360.

The previous prime is 388681639. The next prime is 388681703. The reversal of 388681678 is 876186883.

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, 1261800 + ... + 1262107.

It is an arithmetic number, because the mean of its divisors is an integer number (45430344).

Almost surely, 2^388681678 is an apocalyptic number.

388681678 is a deficient number, since it is larger than the sum of its proper divisors (338203826).

388681678 is a wasteful number, since it uses less digits than its factorization.

388681678 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2523927.

The product of its digits is 3096576, while the sum is 55.

The square root of 388681678 is about 19715.0114887108. The cubic root of 388681678 is about 729.7901930367.

The spelling of 388681678 in words is "three hundred eighty-eight million, six hundred eighty-one thousand, six hundred seventy-eight".