489491636 has 6 divisors (see below), whose sum is σ = 856610370. Its totient is φ = 244745816.

The previous prime is 489491599. The next prime is 489491647. The reversal of 489491636 is 636194984.

It can be written as a sum of positive squares in only one way, i.e., 384552100 + 104939536 = 19610^2 + 10244^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61186451 + ... + 61186458.

It is an arithmetic number, because the mean of its divisors is an integer number (142768395).

Almost surely, 2^489491636 is an apocalyptic number.

It is an amenable number.

489491636 is a deficient number, since it is larger than the sum of its proper divisors (367118734).

489491636 is a wasteful number, since it uses less digits than its factorization.

489491636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122372913 (or 122372911 counting only the distinct ones).

The product of its digits is 1119744, while the sum is 50.

The square root of 489491636 is about 22124.4578690643. The cubic root of 489491636 is about 788.1007820285.

The spelling of 489491636 in words is "four hundred eighty-nine million, four hundred ninety-one thousand, six hundred thirty-six".