987109428 has 12 divisors (see below), whose sum is σ = 2303255360. Its totient is φ = 329036472.

The previous prime is 987109427. The next prime is 987109433. The reversal of 987109428 is 824901789.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (987109427) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 41129548 + ... + 41129571.

Almost surely, 2^987109428 is an apocalyptic number.

It is an amenable number.

987109428 is an abundant number, since it is smaller than the sum of its proper divisors (1316145932).

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

987109428 is a wasteful number, since it uses less digits than its factorization.

987109428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 82259126 (or 82259124 counting only the distinct ones).

The product of its (nonzero) digits is 290304, while the sum is 48.

The square root of 987109428 is about 31418.2976623496. The cubic root of 987109428 is about 995.6845463153.

The spelling of 987109428 in words is "nine hundred eighty-seven million, one hundred nine thousand, four hundred twenty-eight".