490816257 has 4 divisors (see below), whose sum is σ = 654421680. Its totient is φ = 327210836.

The previous prime is 490816247. The next prime is 490816283. The reversal of 490816257 is 752618094.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 490816257 - 2¹⁴ = 490799873 is a prime.

It is not an unprimeable number, because it can be changed into a prime (490816247) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 81802707 + ... + 81802712.

It is an arithmetic number, because the mean of its divisors is an integer number (163605420).

Almost surely, 2^490816257 is an apocalyptic number.

It is an amenable number.

490816257 is a deficient number, since it is larger than the sum of its proper divisors (163605423).

490816257 is a wasteful number, since it uses less digits than its factorization.

490816257 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163605422.

The product of its (nonzero) digits is 120960, while the sum is 42.

The square root of 490816257 is about 22154.3733154427. The cubic root of 490816257 is about 788.8110390333.

The spelling of 490816257 in words is "four hundred ninety million, eight hundred sixteen thousand, two hundred fifty-seven".