987772 has 24 divisors (see below), whose sum is σ = 1869840. Its totient is φ = 455040.

The previous prime is 987739. The next prime is 987793. The reversal of 987772 is 277789.

It is a nialpdrome in base 10.

It is a congruent number.

It is an unprimeable number.

987772 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 (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2958 + ... + 3274.

It is an arithmetic number, because the mean of its divisors is an integer number (77910).

2⁹⁸⁷⁷⁷² is an apocalyptic number.

It is an amenable number.

987772 is a deficient number, since it is larger than the sum of its proper divisors (882068).

987772 is a wasteful number, since it uses less digits than its factorization.

987772 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 381 (or 379 counting only the distinct ones).

The product of its digits is 49392, while the sum is 40.

The square root of 987772 is about 993.8671943474. The cubic root of 987772 is about 99.5907272433.

The spelling of 987772 in words is "nine hundred eighty-seven thousand, seven hundred seventy-two".