491607630 has 160 divisors (see below), whose sum is σ = 1376530848. Its totient is φ = 125798400.

The previous prime is 491607619. The next prime is 491607637. The reversal of 491607630 is 36706194.

491607630 is a `hidden beast` number, since 4 + 9 + 16 + 0 + 7 + 630 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491607637) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 3752665 + ... + 3752795.

Almost surely, 2^491607630 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 491607630, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (688265424).

491607630 is an abundant number, since it is smaller than the sum of its proper divisors (884923218).

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

491607630 is a wasteful number, since it uses less digits than its factorization.

491607630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 304 (or 295 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 491607630 is about 22172.2265458388. The cubic root of 491607630 is about 789.2347607741.

The spelling of 491607630 in words is "four hundred ninety-one million, six hundred seven thousand, six hundred thirty".