388858785 has 16 divisors (see below), whose sum is σ = 711056256. Its totient is φ = 177763968.

The previous prime is 388858781. The next prime is 388858819. The reversal of 388858785 is 587858883.

It is not a de Polignac number, because 388858785 - 2² = 388858781 is a prime.

It is a super-2 number, since 2×388858785² = 302422309343352450, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388858781) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1851604 + ... + 1851813.

It is an arithmetic number, because the mean of its divisors is an integer number (44441016).

Almost surely, 2^388858785 is an apocalyptic number.

388858785 is a gapful number since it is divisible by the number (35) formed by its first and last digit.

It is an amenable number.

388858785 is a deficient number, since it is larger than the sum of its proper divisors (322197471).

388858785 is a wasteful number, since it uses less digits than its factorization.

388858785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3703432.

The product of its digits is 17203200, while the sum is 60.

The square root of 388858785 is about 19719.5026560002. The cubic root of 388858785 is about 729.9010217966.

The spelling of 388858785 in words is "three hundred eighty-eight million, eight hundred fifty-eight thousand, seven hundred eighty-five".