489229640 has 32 divisors (see below), whose sum is σ = 1104063480. Its totient is φ = 195105792.

The previous prime is 489229633. The next prime is 489229649. The reversal of 489229640 is 46922984.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 179399236 + 309830404 = 13394^2 + 17602^2 .

It is a junction number, because it is equal to n+sod(n) for n = 489229591 and 489229600.

It is not an unprimeable number, because it can be changed into a prime (489229649) 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, 4667 + ... + 31626.

Almost surely, 2^489229640 is an apocalyptic number.

489229640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

489229640 is an abundant number, since it is smaller than the sum of its proper divisors (614833840).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

489229640 is a wasteful number, since it uses less digits than its factorization.

489229640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36641 (or 36637 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 44.

The square root of 489229640 is about 22118.5361179261. The cubic root of 489229640 is about 787.9601489806.

The spelling of 489229640 in words is "four hundred eighty-nine million, two hundred twenty-nine thousand, six hundred forty".