387665 has 8 divisors (see below), whose sum is σ = 485568. Its totient is φ = 296560.

The previous prime is 387659. The next prime is 387677. The reversal of 387665 is 566783.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 387665 - 2¹⁰ = 386641 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1571 + ... + 1800.

It is an arithmetic number, because the mean of its divisors is an integer number (60696).

2³⁸⁷⁶⁶⁵ is an apocalyptic number.

It is an amenable number.

387665 is a deficient number, since it is larger than the sum of its proper divisors (97903).

387665 is a wasteful number, since it uses less digits than its factorization.

387665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3399.

The product of its digits is 30240, while the sum is 35.

The square root of 387665 is about 622.6274969835. The cubic root of 387665 is about 72.9153331275.

The spelling of 387665 in words is "three hundred eighty-seven thousand, six hundred sixty-five".