490676581 has 8 divisors (see below), whose sum is σ = 498314520. Its totient is φ = 483063552.

The previous prime is 490676579. The next prime is 490676591. The reversal of 490676581 is 185676094.

It can be written as a sum of positive squares in 4 ways, for example, as 17222500 + 473454081 = 4150^2 + 21759^2 .

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 490676581 - 2¹ = 490676579 is a prime.

It is a super-2 number, since 2×490676581² = 481527014283699122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490676551) 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, 35631 + ... + 47443.

It is an arithmetic number, because the mean of its divisors is an integer number (62289315).

Almost surely, 2^490676581 is an apocalyptic number.

It is an amenable number.

490676581 is a deficient number, since it is larger than the sum of its proper divisors (7637939).

490676581 is a wasteful number, since it uses less digits than its factorization.

490676581 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12455.

The product of its (nonzero) digits is 362880, while the sum is 46.

The square root of 490676581 is about 22151.2207564278. The cubic root of 490676581 is about 788.7362055817.

The spelling of 490676581 in words is "four hundred ninety million, six hundred seventy-six thousand, five hundred eighty-one".