989959538 has 8 divisors (see below), whose sum is σ = 1572288732. Its totient is φ = 465863296.

The previous prime is 989959511. The next prime is 989959561. The reversal of 989959538 is 835959989.

It can be written as a sum of positive squares in 2 ways, for example, as 972628969 + 17330569 = 31187^2 + 4163^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-3 number, since 3×989959538³ (a number of 28 digits) contains 333 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14558195 + ... + 14558262.

Almost surely, 2^989959538 is an apocalyptic number.

989959538 is a deficient number, since it is larger than the sum of its proper divisors (582329194).

989959538 is a wasteful number, since it uses less digits than its factorization.

989959538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29116476.

The product of its digits is 31492800, while the sum is 65.

The square root of 989959538 is about 31463.6224551465. The cubic root of 989959538 is about 996.6419152227.

The spelling of 989959538 in words is "nine hundred eighty-nine million, nine hundred fifty-nine thousand, five hundred thirty-eight".