491976776 has 8 divisors (see below), whose sum is σ = 922456470. Its totient is φ = 245988384.

The previous prime is 491976769. The next prime is 491976833. The reversal of 491976776 is 677679194.

It can be written as a sum of positive squares in only one way, i.e., 476374276 + 15602500 = 21826^2 + 3950^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×491976776² = 484082296246708352, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30748541 + ... + 30748556.

Almost surely, 2^491976776 is an apocalyptic number.

It is an amenable number.

491976776 is a deficient number, since it is larger than the sum of its proper divisors (430479694).

491976776 is a wasteful number, since it uses less digits than its factorization.

491976776 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61497103 (or 61497099 counting only the distinct ones).

The product of its digits is 4000752, while the sum is 56.

The square root of 491976776 is about 22180.5494972510. The cubic root of 491976776 is about 789.4322556493.

The spelling of 491976776 in words is "four hundred ninety-one million, nine hundred seventy-six thousand, seven hundred seventy-six".