989351388 has 24 divisors (see below), whose sum is σ = 2564985360. Its totient is φ = 329783760.

The previous prime is 989351381. The next prime is 989351411. The reversal of 989351388 is 883153989.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (989351381) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4580223 + ... + 4580438.

It is an arithmetic number, because the mean of its divisors is an integer number (106874390).

Almost surely, 2^989351388 is an apocalyptic number.

It is an amenable number.

989351388 is an abundant number, since it is smaller than the sum of its proper divisors (1575633972).

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

989351388 is a wasteful number, since it uses less digits than its factorization.

989351388 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9160674 (or 9160666 counting only the distinct ones).

The product of its digits is 1866240, while the sum is 54.

The square root of 989351388 is about 31453.9566350563. The cubic root of 989351388 is about 996.4377883824.

The spelling of 989351388 in words is "nine hundred eighty-nine million, three hundred fifty-one thousand, three hundred eighty-eight".