499728491 has 8 divisors (see below), whose sum is σ = 503857200. Its totient is φ = 495607680.

The previous prime is 499728479. The next prime is 499728517. The reversal of 499728491 is 194827994.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 499728491 - 2²² = 495534187 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (499728421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 238175 + ... + 240263.

It is an arithmetic number, because the mean of its divisors is an integer number (62982150).

Almost surely, 2^499728491 is an apocalyptic number.

499728491 is a deficient number, since it is larger than the sum of its proper divisors (4128709).

499728491 is a wasteful number, since it uses less digits than its factorization.

499728491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3949.

The product of its digits is 1306368, while the sum is 53.

The square root of 499728491 is about 22354.6078247864. The cubic root of 499728491 is about 793.5568354147.

The spelling of 499728491 in words is "four hundred ninety-nine million, seven hundred twenty-eight thousand, four hundred ninety-one".