989525990 has 16 divisors (see below), whose sum is σ = 1781505360. Its totient is φ = 395730720.

The previous prime is 989525989. The next prime is 989526001. The reversal of 989525990 is 99525989.

It is a super-3 number, since 3×989525990³ (a number of 28 digits) contains 333 as substring.

It is a congruent 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, 89381 + ... + 99839.

It is an arithmetic number, because the mean of its divisors is an integer number (111344085).

Almost surely, 2^989525990 is an apocalyptic number.

989525990 is a deficient number, since it is larger than the sum of its proper divisors (791979370).

989525990 is a wasteful number, since it uses less digits than its factorization.

989525990 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19927.

The product of its (nonzero) digits is 2624400, while the sum is 56.

The square root of 989525990 is about 31456.7320298851. The cubic root of 989525990 is about 996.4964024735.

The spelling of 989525990 in words is "nine hundred eighty-nine million, five hundred twenty-five thousand, nine hundred ninety".