987822 has 32 divisors (see below), whose sum is σ = 2396160. Its totient is φ = 299160.

The previous prime is 987821. The next prime is 987851. The reversal of 987822 is 228789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987821) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 238 + ... + 1425.

It is an arithmetic number, because the mean of its divisors is an integer number (74880).

2⁹⁸⁷⁸²² is an apocalyptic number.

987822 is an abundant number, since it is smaller than the sum of its proper divisors (1408338).

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

987822 is a wasteful number, since it uses less digits than its factorization.

987822 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1685 (or 1679 counting only the distinct ones).

The product of its digits is 16128, while the sum is 36.

The square root of 987822 is about 993.8923482953. The cubic root of 987822 is about 99.5924076082.

The spelling of 987822 in words is "nine hundred eighty-seven thousand, eight hundred twenty-two".