864490 has 32 divisors (see below), whose sum is σ = 1762560. Its totient is φ = 302400.

The previous prime is 864449. The next prime is 864491. The reversal of 864490 is 94468.

864490 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (864491) 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, 3055 + ... + 3325.

It is an arithmetic number, because the mean of its divisors is an integer number (55080).

2⁸⁶⁴⁴⁹⁰ is an apocalyptic number.

864490 is an abundant number, since it is smaller than the sum of its proper divisors (898070).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

864490 is a wasteful number, since it uses less digits than its factorization.

864490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318.

The product of its (nonzero) digits is 6912, while the sum is 31.

The square root of 864490 is about 929.7795437629. The cubic root of 864490 is about 95.2620649588.

The spelling of 864490 in words is "eight hundred sixty-four thousand, four hundred ninety".