631384 has 24 divisors (see below), whose sum is σ = 1284660. Its totient is φ = 290784.

The previous prime is 631361. The next prime is 631387. The reversal of 631384 is 483136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631387) by changing a digit.

631384 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 5 ways as a sum of consecutive naturals, for example, 1119 + ... + 1585.

2⁶³¹³⁸⁴ 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 631384, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (642330).

631384 is an abundant number, since it is smaller than the sum of its proper divisors (653276).

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

631384 is a wasteful number, since it uses less digits than its factorization.

631384 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 499 (or 482 counting only the distinct ones).

The product of its digits is 1728, while the sum is 25.

The square root of 631384 is about 794.5967530767. The cubic root of 631384 is about 85.7889180667.

The spelling of 631384 in words is "six hundred thirty-one thousand, three hundred eighty-four".