634530 has 32 divisors (see below), whose sum is σ = 1641024. Its totient is φ = 156096.

The previous prime is 634523. The next prime is 634531. The reversal of 634530 is 35436.

634530 = T₃₇₁ + T₃₇₂ + ... + T₃₇₉.

634530 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 634497 and 634506.

It is not an unprimeable number, because it can be changed into a prime (634531) by changing a digit.

634530 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, 424 + ... + 1203.

It is an arithmetic number, because the mean of its divisors is an integer number (51282).

2⁶³⁴⁵³⁰ is an apocalyptic number.

634530 is an abundant number, since it is smaller than the sum of its proper divisors (1006494).

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

634530 is a wasteful number, since it uses less digits than its factorization.

634530 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1650.

The product of its (nonzero) digits is 1080, while the sum is 21.

The square root of 634530 is about 796.5739137079. The cubic root of 634530 is about 85.9311690102.

Adding to 634530 its reverse (35436), we get a palindrome (669966).

It can be divided in two parts, 63 and 4530, that multiplied together give a triangular number (285390 = T₇₅₅).

The spelling of 634530 in words is "six hundred thirty-four thousand, five hundred thirty".