630438 has 16 divisors (see below), whose sum is σ = 1270080. Its totient is φ = 208616.

The previous prime is 630433. The next prime is 630451. The reversal of 630438 is 834036.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (630433) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 781 + ... + 1367.

It is an arithmetic number, because the mean of its divisors is an integer number (79380).

2⁶³⁰⁴³⁸ is an apocalyptic number.

630438 is an abundant number, since it is smaller than the sum of its proper divisors (639642).

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

630438 is a wasteful number, since it uses less digits than its factorization.

630438 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 771.

The product of its (nonzero) digits is 1728, while the sum is 24.

The square root of 630438 is about 794.0012594448. The cubic root of 630438 is about 85.7460509250.

The spelling of 630438 in words is "six hundred thirty thousand, four hundred thirty-eight".