987821732 has 6 divisors (see below), whose sum is σ = 1728688038. Its totient is φ = 493910864.

The previous prime is 987821729. The next prime is 987821743. The reversal of 987821732 is 237128789.

It can be written as a sum of positive squares in only one way, i.e., 874739776 + 113081956 = 29576^2 + 10634^2 .

It is a super-2 number, since 2×987821732² = 1951583548422959648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 123477713 + ... + 123477720.

It is an arithmetic number, because the mean of its divisors is an integer number (288114673).

Almost surely, 2^987821732 is an apocalyptic number.

It is an amenable number.

987821732 is a deficient number, since it is larger than the sum of its proper divisors (740866306).

987821732 is a wasteful number, since it uses less digits than its factorization.

987821732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 246955437 (or 246955435 counting only the distinct ones).

The product of its digits is 338688, while the sum is 47.

The square root of 987821732 is about 31429.6314327738. The cubic root of 987821732 is about 995.9239860162.

The spelling of 987821732 in words is "nine hundred eighty-seven million, eight hundred twenty-one thousand, seven hundred thirty-two".