987788 has 6 divisors (see below), whose sum is σ = 1728636. Its totient is φ = 493892.

The previous prime is 987739. The next prime is 987793. The reversal of 987788 is 887789.

It is an unprimeable number.

987788 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 as a sum of consecutive naturals, namely, 123470 + ... + 123477.

It is an arithmetic number, because the mean of its divisors is an integer number (288106).

2⁹⁸⁷⁷⁸⁸ is an apocalyptic number.

It is an amenable number.

987788 is a deficient number, since it is larger than the sum of its proper divisors (740848).

987788 is a wasteful number, since it uses less digits than its factorization.

987788 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 246951 (or 246949 counting only the distinct ones).

The product of its digits is 225792, while the sum is 47.

The square root of 987788 is about 993.8752436800. The cubic root of 987788 is about 99.5912649662.

Subtracting from 987788 its reverse (887789), we obtain a palindrome (99999).

The spelling of 987788 in words is "nine hundred eighty-seven thousand, seven hundred eighty-eight".