491659632 has 100 divisors (see below), whose sum is σ = 1438043376. Its totient is φ = 162155520.

The previous prime is 491659631. The next prime is 491659633. The reversal of 491659632 is 236956194.

491659632 is a `hidden beast` number, since 4 + 9 + 1 + 6 + 5 + 9 + 632 = 666.

It is an interprime number because it is at equal distance from previous prime (491659631) and next prime (491659633).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491659631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 123757 + ... + 127667.

Almost surely, 2^491659632 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 491659632, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (719021688).

491659632 is an abundant number, since it is smaller than the sum of its proper divisors (946383744).

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

491659632 is a wasteful number, since it uses less digits than its factorization.

491659632 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4028 (or 4013 counting only the distinct ones).

The product of its digits is 349920, while the sum is 45.

The square root of 491659632 is about 22173.3991981383. The cubic root of 491659632 is about 789.2625880740.

The spelling of 491659632 in words is "four hundred ninety-one million, six hundred fifty-nine thousand, six hundred thirty-two".