664230 has 32 divisors (see below), whose sum is σ = 1822464. Its totient is φ = 151776.

The previous prime is 664211. The next prime is 664243. The reversal of 664230 is 32466.

664230 = 406² + 407² + ... + 409².

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a junction number, because it is equal to n+sod(n) for n = 664197 and 664206.

It is a congruent number.

It is an unprimeable number.

664230 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 15 ways as a sum of consecutive naturals, for example, 1372 + ... + 1791.

It is an arithmetic number, because the mean of its divisors is an integer number (56952).

2⁶⁶⁴²³⁰ is an apocalyptic number.

664230 is an abundant number, since it is smaller than the sum of its proper divisors (1158234).

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

664230 is a wasteful number, since it uses less digits than its factorization.

664230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3180.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 664230 is about 815.0030674789. The cubic root of 664230 is about 87.2514853210.

Subtracting from 664230 its product of nonzero digits (864), we obtain a palindrome (663366).

Adding to 664230 its reverse (32466), we get a palindrome (696696).

The spelling of 664230 in words is "six hundred sixty-four thousand, two hundred thirty".