987931028 has 24 divisors (see below), whose sum is σ = 1980119232. Its totient is φ = 422486784.

The previous prime is 987931027. The next prime is 987931031. The reversal of 987931028 is 820139789.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987931027) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 24701 + ... + 50852.

It is an arithmetic number, because the mean of its divisors is an integer number (82504968).

Almost surely, 2^987931028 is an apocalyptic number.

It is an amenable number.

987931028 is an abundant number, since it is smaller than the sum of its proper divisors (992188204).

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

987931028 is a wasteful number, since it uses less digits than its factorization.

987931028 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 76031 (or 76029 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 47.

The square root of 987931028 is about 31431.3701260381. The cubic root of 987931028 is about 995.9607154820.

The spelling of 987931028 in words is "nine hundred eighty-seven million, nine hundred thirty-one thousand, twenty-eight".