490989621 has 8 divisors (see below), whose sum is σ = 689108320. Its totient is φ = 310098672.

The previous prime is 490989559. The next prime is 490989643. The reversal of 490989621 is 126989094.

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

It is not a de Polignac number, because 490989621 - 2⁶ = 490989557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (490989221) 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, 4306870 + ... + 4306983.

It is an arithmetic number, because the mean of its divisors is an integer number (86138540).

Almost surely, 2^490989621 is an apocalyptic number.

It is an amenable number.

490989621 is a deficient number, since it is larger than the sum of its proper divisors (198118699).

490989621 is a wasteful number, since it uses less digits than its factorization.

490989621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8613875.

The product of its (nonzero) digits is 279936, while the sum is 48.

The square root of 490989621 is about 22158.2856060662. The cubic root of 490989621 is about 788.9039015775.

The spelling of 490989621 in words is "four hundred ninety million, nine hundred eighty-nine thousand, six hundred twenty-one".