388819 has 4 divisors (see below), whose sum is σ = 390096. Its totient is φ = 387544.

The previous prime is 388813. The next prime is 388823. The reversal of 388819 is 918883.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 388819 - 2⁷ = 388691 is a prime.

It is a super-2 number, since 2×388819² = 302360429522, which contains 22 as substring.

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, 117 + ... + 889.

It is an arithmetic number, because the mean of its divisors is an integer number (97524).

2³⁸⁸⁸¹⁹ is an apocalyptic number.

388819 is a deficient number, since it is larger than the sum of its proper divisors (1277).

388819 is an equidigital number, since it uses as much as digits as its factorization.

388819 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1276.

The product of its digits is 13824, while the sum is 37.

The square root of 388819 is about 623.5535261708. The cubic root of 388819 is about 72.9876128353.

The spelling of 388819 in words is "three hundred eighty-eight thousand, eight hundred nineteen".