987650 has 12 divisors (see below), whose sum is σ = 1837122. Its totient is φ = 395040.

The previous prime is 987631. The next prime is 987659. The reversal of 987650 is 56789.

It can be written as a sum of positive squares in 3 ways, for example, as 628849 + 358801 = 793^2 + 599^2 .

It is an alternating number because its digits alternate between odd and even.

It is a Curzon number.

It is a nialpdrome in base 10.

It is a self number, because there is not a number n which added to its sum of digits gives 987650.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987650.

It is not an unprimeable number, because it can be changed into a prime (987659) by changing a digit.

987650 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 9827 + ... + 9926.

2⁹⁸⁷⁶⁵⁰ is an apocalyptic number.

987650 is a deficient number, since it is larger than the sum of its proper divisors (849472).

987650 is a wasteful number, since it uses less digits than its factorization.

987650 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19765 (or 19760 counting only the distinct ones).

The product of its (nonzero) digits is 15120, while the sum is 35.

The square root of 987650 is about 993.8058160426. The cubic root of 987650 is about 99.5866269148.

It can be divided in two parts, 98 and 7650, that multiplied together give a triangular number (749700 = T₁₂₂₄).

The spelling of 987650 in words is "nine hundred eighty-seven thousand, six hundred fifty".