865630 has 16 divisors (see below), whose sum is σ = 1574640. Its totient is φ = 342592.

The previous prime is 865619. The next prime is 865637. The reversal of 865630 is 36568.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (865637) by changing a digit.

865630 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 666 + ... + 1474.

It is an arithmetic number, because the mean of its divisors is an integer number (98415).

2⁸⁶⁵⁶³⁰ is an apocalyptic number.

865630 is a deficient number, since it is larger than the sum of its proper divisors (709010).

865630 is a wasteful number, since it uses less digits than its factorization.

865630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 923.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 865630 is about 930.3923903386. The cubic root of 865630 is about 95.3039204855.

The spelling of 865630 in words is "eight hundred sixty-five thousand, six hundred thirty".