631364208 has 80 divisors (see below), whose sum is σ = 1663226880. Its totient is φ = 206339328.

The previous prime is 631364203. The next prime is 631364233. The reversal of 631364208 is 802463136.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (631364203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 632766 + ... + 633762.

It is an arithmetic number, because the mean of its divisors is an integer number (20790336).

Almost surely, 2^631364208 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 631364208, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (831613440).

631364208 is an abundant number, since it is smaller than the sum of its proper divisors (1031862672).

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

631364208 is a wasteful number, since it uses less digits than its factorization.

631364208 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1254 (or 1248 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 631364208 is about 25126.9617741581. The cubic root of 631364208 is about 857.8802164870.

The spelling of 631364208 in words is "six hundred thirty-one million, three hundred sixty-four thousand, two hundred eight".