989558340 has 48 divisors (see below), whose sum is σ = 2845655232. Its totient is φ = 256749696.

The previous prime is 989558267. The next prime is 989558341. The reversal of 989558340 is 43855989.

It is a happy number.

It is a hoax number, since the sum of its digits (51) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (989558341) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220654 + ... + 225093.

It is an arithmetic number, because the mean of its divisors is an integer number (59284484).

Almost surely, 2^989558340 is an apocalyptic number.

It is an amenable number.

989558340 is an abundant number, since it is smaller than the sum of its proper divisors (1856096892).

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

989558340 is a wasteful number, since it uses less digits than its factorization.

989558340 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 445796 (or 445794 counting only the distinct ones).

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

The square root of 989558340 is about 31457.2462240419. The cubic root of 989558340 is about 996.5072616484.

The spelling of 989558340 in words is "nine hundred eighty-nine million, five hundred fifty-eight thousand, three hundred forty".