388085812 has 12 divisors (see below), whose sum is σ = 688454116. Its totient is φ = 191384640.

The previous prime is 388085779. The next prime is 388085827. The reversal of 388085812 is 218580883.

It can be written as a sum of positive squares in 2 ways, for example, as 320911396 + 67174416 = 17914^2 + 8196^2 .

It is a super-2 number, since 2×388085812² = 301221194951398688, which contains 22 as substring.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 664239 + ... + 664822.

Almost surely, 2^388085812 is an apocalyptic number.

It is an amenable number.

388085812 is a deficient number, since it is larger than the sum of its proper divisors (300368304).

388085812 is a wasteful number, since it uses less digits than its factorization.

388085812 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1329138 (or 1329136 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 388085812 is about 19699.8937052970. The cubic root of 388085812 is about 729.4170688791.

The spelling of 388085812 in words is "three hundred eighty-eight million, eighty-five thousand, eight hundred twelve".