999488 has 56 divisors (see below), whose sum is σ = 2389632. Its totient is φ = 405504.

The previous prime is 999451. The next prime is 999491. The reversal of 999488 is 884999.

It is a tau number, because it is divible by the number of its divisors (56).

It is a congruent number.

It is an unprimeable number.

999488 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10256 + ... + 10352.

It is an arithmetic number, because the mean of its divisors is an integer number (42672).

2⁹⁹⁹⁴⁸⁸ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 999488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1194816).

999488 is an abundant number, since it is smaller than the sum of its proper divisors (1390144).

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

999488 is a wasteful number, since it uses less digits than its factorization.

999488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139 (or 129 counting only the distinct ones).

The product of its digits is 186624, while the sum is 47.

The square root of 999488 is about 999.7439672236. The cubic root of 999488 is about 99.9829304198.

The spelling of 999488 in words is "nine hundred ninety-nine thousand, four hundred eighty-eight".