489942646 has 8 divisors (see below), whose sum is σ = 760255920. Its totient is φ = 236524008.

The previous prime is 489942643. The next prime is 489942647. The reversal of 489942646 is 646249984.

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

It is a junction number, because it is equal to n+sod(n) for n = 489942593 and 489942602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (489942643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4223586 + ... + 4223701.

It is an arithmetic number, because the mean of its divisors is an integer number (95031990).

Almost surely, 2^489942646 is an apocalyptic number.

489942646 is a deficient number, since it is larger than the sum of its proper divisors (270313274).

489942646 is a wasteful number, since it uses less digits than its factorization.

489942646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8447318.

The product of its digits is 2985984, while the sum is 52.

The square root of 489942646 is about 22134.6480884608. The cubic root of 489942646 is about 788.3427556718.

The spelling of 489942646 in words is "four hundred eighty-nine million, nine hundred forty-two thousand, six hundred forty-six".