631548 has 36 divisors (see below), whose sum is σ = 1631448. Its totient is φ = 205920.

The previous prime is 631537. The next prime is 631549. The reversal of 631548 is 845136.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631549) by changing a digit.

631548 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

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 11 ways as a sum of consecutive naturals, for example, 1743 + ... + 2073.

It is an arithmetic number, because the mean of its divisors is an integer number (45318).

2⁶³¹⁵⁴⁸ 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 631548, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (815724).

631548 is an abundant number, since it is smaller than the sum of its proper divisors (999900).

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

631548 is a wasteful number, since it uses less digits than its factorization.

631548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 394 (or 389 counting only the distinct ones).

The product of its digits is 2880, while the sum is 27.

The square root of 631548 is about 794.6999433749. The cubic root of 631548 is about 85.7963452239.

The spelling of 631548 in words is "six hundred thirty-one thousand, five hundred forty-eight".