499640 has 16 divisors (see below), whose sum is σ = 1124280. Its totient is φ = 199840.

The previous prime is 499637. The next prime is 499649. The reversal of 499640 is 46994.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 499597 and 499606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (499649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6206 + ... + 6285.

2⁴⁹⁹⁶⁴⁰ is an apocalyptic number.

499640 is a gapful number since it is divisible by the number (40) formed by its first and last digit.

It is an amenable number.

499640 is an abundant number, since it is smaller than the sum of its proper divisors (624640).

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

499640 is a wasteful number, since it uses less digits than its factorization.

499640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12502 (or 12498 counting only the distinct ones).

The product of its (nonzero) digits is 7776, while the sum is 32.

The square root of 499640 is about 706.8521769083. The cubic root of 499640 is about 79.3509992122.

The spelling of 499640 in words is "four hundred ninety-nine thousand, six hundred forty".