865490 has 32 divisors (see below), whose sum is σ = 1679616. Its totient is φ = 320320.

The previous prime is 865483. The next prime is 865493. The reversal of 865490 is 94568.

865490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-4 number, since 4×865490⁴ (a number of 25 digits) contains 4444 as substring.

It is not an unprimeable number, because it can be changed into a prime (865493) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 12155 + ... + 12225.

It is an arithmetic number, because the mean of its divisors is an integer number (52488).

2⁸⁶⁵⁴⁹⁰ is an apocalyptic number.

865490 is a deficient number, since it is larger than the sum of its proper divisors (814126).

865490 is a wasteful number, since it uses less digits than its factorization.

865490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 154.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 865490 is about 930.3171502235. The cubic root of 865490 is about 95.2987823132.

The spelling of 865490 in words is "eight hundred sixty-five thousand, four hundred ninety".