634430 has 8 divisors (see below), whose sum is σ = 1141992. Its totient is φ = 253768.

The previous prime is 634421. The next prime is 634441. The reversal of 634430 is 34436.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a congruent number.

It is an unprimeable number.

634430 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 3 ways as a sum of consecutive naturals, for example, 31712 + ... + 31731.

It is an arithmetic number, because the mean of its divisors is an integer number (142749).

2⁶³⁴⁴³⁰ is an apocalyptic number.

634430 is a deficient number, since it is larger than the sum of its proper divisors (507562).

634430 is a wasteful number, since it uses less digits than its factorization.

634430 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63450.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 634430 is about 796.5111424205. The cubic root of 634430 is about 85.9266546093.

Adding to 634430 its reverse (34436), we get a palindrome (668866).

The spelling of 634430 in words is "six hundred thirty-four thousand, four hundred thirty".