989538540 has 24 divisors (see below), whose sum is σ = 2770708080. Its totient is φ = 263876928.

The previous prime is 989538497. The next prime is 989538553. The reversal of 989538540 is 45835989.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8246095 + ... + 8246214.

It is an arithmetic number, because the mean of its divisors is an integer number (115446170).

Almost surely, 2^989538540 is an apocalyptic number.

It is an amenable number.

989538540 is an abundant number, since it is smaller than the sum of its proper divisors (1781169540).

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

989538540 is a wasteful number, since it uses less digits than its factorization.

989538540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16492321 (or 16492319 counting only the distinct ones).

The product of its (nonzero) digits is 1555200, while the sum is 51.

The square root of 989538540 is about 31456.9315096053. The cubic root of 989538540 is about 996.5006152572.

The spelling of 989538540 in words is "nine hundred eighty-nine million, five hundred thirty-eight thousand, five hundred forty".