388085811 has 8 divisors (see below), whose sum is σ = 544681920. Its totient is φ = 245106792.

The previous prime is 388085779. The next prime is 388085827. The reversal of 388085811 is 118580883.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 388085811 - 2⁵ = 388085779 is a prime.

It is a super-2 number, since 2×388085811² = 301221193399055442, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (388085861) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3404205 + ... + 3404318.

It is an arithmetic number, because the mean of its divisors is an integer number (68085240).

Almost surely, 2^388085811 is an apocalyptic number.

388085811 is a deficient number, since it is larger than the sum of its proper divisors (156596109).

388085811 is a wasteful number, since it uses less digits than its factorization.

388085811 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6808545.

The product of its (nonzero) digits is 61440, while the sum is 42.

The square root of 388085811 is about 19699.8936799161. The cubic root of 388085811 is about 729.4170682526.

The spelling of 388085811 in words is "three hundred eighty-eight million, eighty-five thousand, eight hundred eleven".