987440 has 20 divisors (see below), whose sum is σ = 2295984. Its totient is φ = 394944.

The previous prime is 987433. The next prime is 987457. The reversal of 987440 is 44789.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (20).

It is a nialpdrome in base 10.

It is a junction number, because it is equal to n+sod(n) for n = 987397 and 987406.

It is an unprimeable number.

987440 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 3 ways as a sum of consecutive naturals, for example, 6092 + ... + 6251.

2⁹⁸⁷⁴⁴⁰ is an apocalyptic number.

It is an amenable number.

987440 is an abundant number, since it is smaller than the sum of its proper divisors (1308544).

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

987440 is a wasteful number, since it uses less digits than its factorization.

987440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12356 (or 12350 counting only the distinct ones).

The product of its (nonzero) digits is 8064, while the sum is 32.

The square root of 987440 is about 993.7001559827. The cubic root of 987440 is about 99.5795681814.

The spelling of 987440 in words is "nine hundred eighty-seven thousand, four hundred forty".