388289 has 6 divisors (see below), whose sum is σ = 426930. Its totient is φ = 352880.

The previous prime is 388277. The next prime is 388301. The reversal of 388289 is 982883.

It is an interprime number because it is at equal distance from previous prime (388277) and next prime (388301).

It can be written as a sum of positive squares in only one way, i.e., 339889 + 48400 = 583^2 + 220^2 .

It is not a de Polignac number, because 388289 - 2⁴ = 388273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (388259) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1484 + ... + 1725.

It is an arithmetic number, because the mean of its divisors is an integer number (71155).

2³⁸⁸²⁸⁹ is an apocalyptic number.

It is an amenable number.

388289 is a deficient number, since it is larger than the sum of its proper divisors (38641).

388289 is a wasteful number, since it uses less digits than its factorization.

388289 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3231 (or 3220 counting only the distinct ones).

The product of its digits is 27648, while the sum is 38.

The square root of 388289 is about 623.1283976838. The cubic root of 388289 is about 72.9544345659.

The spelling of 388289 in words is "three hundred eighty-eight thousand, two hundred eighty-nine".