499890 has 32 divisors (see below), whose sum is σ = 1264320. Its totient is φ = 126144.

The previous prime is 499883. The next prime is 499897. The reversal of 499890 is 98994.

It is an interprime number because it is at equal distance from previous prime (499883) and next prime (499897).

It is not an unprimeable number, because it can be changed into a prime (499897) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132 + ... + 1008.

It is an arithmetic number, because the mean of its divisors is an integer number (39510).

2⁴⁹⁹⁸⁹⁰ is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 499890, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (632160).

499890 is an abundant number, since it is smaller than the sum of its proper divisors (764430).

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

499890 is a wasteful number, since it uses less digits than its factorization.

499890 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 906.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 499890 is about 707.0289951622. The cubic root of 499890 is about 79.3642317010.

The spelling of 499890 in words is "four hundred ninety-nine thousand, eight hundred ninety".