388077866 has 16 divisors (see below), whose sum is σ = 636169248. Its totient is φ = 176084400.

The previous prime is 388077847. The next prime is 388077883. The reversal of 388077866 is 668770883.

It is a super-2 number, since 2×388077866² = 301208860158227912, which contains 22 as substring.

It is a Curzon number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2885 + ... + 28008.

It is an arithmetic number, because the mean of its divisors is an integer number (39760578).

Almost surely, 2^388077866 is an apocalyptic number.

388077866 is a deficient number, since it is larger than the sum of its proper divisors (248091382).

388077866 is a wasteful number, since it uses less digits than its factorization.

388077866 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31477.

The product of its (nonzero) digits is 2709504, while the sum is 53.

The square root of 388077866 is about 19699.6920280496. The cubic root of 388077866 is about 729.4120906094.

The spelling of 388077866 in words is "three hundred eighty-eight million, seventy-seven thousand, eight hundred sixty-six".