987940 has 24 divisors (see below), whose sum is σ = 2120832. Its totient is φ = 386400.

The previous prime is 987929. The next prime is 987941. The reversal of 987940 is 49789.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 987940.

It is not an unprimeable number, because it can be changed into a prime (987941) 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, 415 + ... + 1465.

It is an arithmetic number, because the mean of its divisors is an integer number (88368).

2⁹⁸⁷⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

987940 is an abundant number, since it is smaller than the sum of its proper divisors (1132892).

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

987940 is a wasteful number, since it uses less digits than its factorization.

987940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1107 (or 1105 counting only the distinct ones).

The product of its (nonzero) digits is 18144, while the sum is 37.

The square root of 987940 is about 993.9517090885. The cubic root of 987940 is about 99.5963730447.

The spelling of 987940 in words is "nine hundred eighty-seven thousand, nine hundred forty".