388291 has 4 divisors (see below), whose sum is σ = 392392. Its totient is φ = 384192.

The previous prime is 388277. The next prime is 388301. The reversal of 388291 is 192883.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 388291 - 2⁵ = 388259 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1905 + ... + 2098.

It is an arithmetic number, because the mean of its divisors is an integer number (98098).

2³⁸⁸²⁹¹ is an apocalyptic number.

388291 is a deficient number, since it is larger than the sum of its proper divisors (4101).

388291 is an equidigital number, since it uses as much as digits as its factorization.

388291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4100.

The product of its digits is 3456, while the sum is 31.

The square root of 388291 is about 623.1300024874. The cubic root of 388291 is about 72.9545598236.

The spelling of 388291 in words is "three hundred eighty-eight thousand, two hundred ninety-one".