491926620 has 48 divisors (see below), whose sum is σ = 1458420768. Its totient is φ = 123463680.

The previous prime is 491926619. The next prime is 491926639. The reversal of 491926620 is 26629194.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 240121 + ... + 242160.

It is an arithmetic number, because the mean of its divisors is an integer number (30383766).

Almost surely, 2^491926620 is an apocalyptic number.

It is an amenable number.

491926620 is an abundant number, since it is smaller than the sum of its proper divisors (966494148).

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

491926620 is a wasteful number, since it uses less digits than its factorization.

491926620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482310 (or 482308 counting only the distinct ones).

The product of its (nonzero) digits is 46656, while the sum is 39.

The square root of 491926620 is about 22179.4188381932. The cubic root of 491926620 is about 789.4054277503.

The spelling of 491926620 in words is "four hundred ninety-one million, nine hundred twenty-six thousand, six hundred twenty".