388665 has 16 divisors (see below), whose sum is σ = 691200. Its totient is φ = 207216.

The previous prime is 388657. The next prime is 388673. The reversal of 388665 is 566883.

It is an interprime number because it is at equal distance from previous prime (388657) and next prime (388673).

It is not a de Polignac number, because 388665 - 2³ = 388657 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1305 + ... + 1574.

It is an arithmetic number, because the mean of its divisors is an integer number (43200).

2³⁸⁸⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

388665 is a deficient number, since it is larger than the sum of its proper divisors (302535).

388665 is a wasteful number, since it uses less digits than its factorization.

388665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2893 (or 2887 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 388665 is about 623.4300281507. The cubic root of 388665 is about 72.9779754662.

The spelling of 388665 in words is "three hundred eighty-eight thousand, six hundred sixty-five".