631098 has 64 divisors (see below), whose sum is σ = 1612800. Its totient is φ = 181440.

The previous prime is 631061. The next prime is 631121. The reversal of 631098 is 890136.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 20343 + ... + 20373.

It is an arithmetic number, because the mean of its divisors is an integer number (25200).

2⁶³¹⁰⁹⁸ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631098, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (806400).

631098 is an abundant number, since it is smaller than the sum of its proper divisors (981702).

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

631098 is a wasteful number, since it uses less digits than its factorization.

631098 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 631098 is about 794.4167671947. The cubic root of 631098 is about 85.7759627515.

The spelling of 631098 in words is "six hundred thirty-one thousand, ninety-eight".