634536 has 48 divisors (see below), whose sum is σ = 1965600. Its totient is φ = 181152.

The previous prime is 634531. The next prime is 634541. The reversal of 634536 is 635436.

634536 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (634531) and next prime (634541).

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

634536 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 11 ways as a sum of consecutive naturals, for example, 126 + ... + 1133.

It is an arithmetic number, because the mean of its divisors is an integer number (40950).

2⁶³⁴⁵³⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 634536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (982800).

634536 is an abundant number, since it is smaller than the sum of its proper divisors (1331064).

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

634536 is a wasteful number, since it uses less digits than its factorization.

634536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1278 (or 1271 counting only the distinct ones).

The product of its digits is 6480, while the sum is 27.

The square root of 634536 is about 796.5776798279. The cubic root of 634536 is about 85.9314398592.

Subtracting 634536 from its reverse (635436), we obtain a square (900 = 30²).

The spelling of 634536 in words is "six hundred thirty-four thousand, five hundred thirty-six".