987776 has 16 divisors (see below), whose sum is σ = 1968090. Its totient is φ = 493824.

The previous prime is 987739. The next prime is 987793. The reversal of 987776 is 677789.

It can be written as a sum of positive squares in only one way, i.e., 846400 + 141376 = 920^2 + 376^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is a nialpdrome in base 10.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 987776.

It is an unprimeable number.

987776 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 as a sum of consecutive naturals, namely, 3731 + ... + 3986.

2⁹⁸⁷⁷⁷⁶ is an apocalyptic number.

It is an amenable number.

987776 is a deficient number, since it is larger than the sum of its proper divisors (980314).

987776 is an equidigital number, since it uses as much as digits as its factorization.

987776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7731 (or 7719 counting only the distinct ones).

The product of its digits is 148176, while the sum is 44.

The square root of 987776 is about 993.8692066867. The cubic root of 987776 is about 99.5908616746.

The spelling of 987776 in words is "nine hundred eighty-seven thousand, seven hundred seventy-six".