497721856 has 20 divisors (see below), whose sum is σ = 994472622. Its totient is φ = 248860672.

The previous prime is 497721827. The next prime is 497721893. The reversal of 497721856 is 658127794.

It can be written as a sum of positive squares in only one way, i.e., 467251456 + 30470400 = 21616^2 + 5520^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 485545 + ... + 486568.

Almost surely, 2^497721856 is an apocalyptic number.

It is an amenable number.

497721856 is a deficient number, since it is larger than the sum of its proper divisors (496750766).

497721856 is an frugal number, since it uses more digits than its factorization.

497721856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 972131 (or 972115 counting only the distinct ones).

The product of its digits is 846720, while the sum is 49.

The square root of 497721856 is about 22309.6807686708. The cubic root of 497721856 is about 792.4932478270.

The spelling of 497721856 in words is "four hundred ninety-seven million, seven hundred twenty-one thousand, eight hundred fifty-six".