987618 has 16 divisors (see below), whose sum is σ = 1986336. Its totient is φ = 327360.

The previous prime is 987607. The next prime is 987631. The reversal of 987618 is 816789.

987618 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is an unprimeable number.

987618 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, 1105 + ... + 1787.

It is an arithmetic number, because the mean of its divisors is an integer number (124146).

2⁹⁸⁷⁶¹⁸ is an apocalyptic number.

987618 is an abundant number, since it is smaller than the sum of its proper divisors (998718).

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

987618 is a wasteful number, since it uses less digits than its factorization.

987618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 929.

The product of its digits is 24192, while the sum is 39.

The square root of 987618 is about 993.7897161875. The cubic root of 987618 is about 99.5855513629.

The spelling of 987618 in words is "nine hundred eighty-seven thousand, six hundred eighteen".