631904196 has 144 divisors (see below), whose sum is σ = 1886395392. Its totient is φ = 162792000.

The previous prime is 631904153. The next prime is 631904197. The reversal of 631904196 is 691409136.

It is not an unprimeable number, because it can be changed into a prime (631904197) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 976345 + ... + 976991.

It is an arithmetic number, because the mean of its divisors is an integer number (13099968).

Almost surely, 2^631904196 is an apocalyptic number.

631904196 is a gapful number since it is divisible by the number (66) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 631904196, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (943197696).

631904196 is an abundant number, since it is smaller than the sum of its proper divisors (1254491196).

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

631904196 is a wasteful number, since it uses less digits than its factorization.

631904196 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 830 (or 821 counting only the distinct ones).

The product of its (nonzero) digits is 34992, while the sum is 39.

The square root of 631904196 is about 25137.7046684855. The cubic root of 631904196 is about 858.1247203789.

The spelling of 631904196 in words is "six hundred thirty-one million, nine hundred four thousand, one hundred ninety-six".