388811 has 4 divisors (see below), whose sum is σ = 390432. Its totient is φ = 387192.

The previous prime is 388793. The next prime is 388813. The reversal of 388811 is 118883.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 118883 = 19 ⋅6257.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-388811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388813) by changing a digit.

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, 371 + ... + 956.

It is an arithmetic number, because the mean of its divisors is an integer number (97608).

2³⁸⁸⁸¹¹ is an apocalyptic number.

388811 is a deficient number, since it is larger than the sum of its proper divisors (1621).

388811 is a wasteful number, since it uses less digits than its factorization.

388811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1620.

The product of its digits is 1536, while the sum is 29.

The square root of 388811 is about 623.5471112915. The cubic root of 388811 is about 72.9871122554.

The spelling of 388811 in words is "three hundred eighty-eight thousand, eight hundred eleven".