989139492 has 288 divisors, whose sum is σ = 3086307840. Its totient is φ = 271434240.

The previous prime is 989139491. The next prime is 989139493. The reversal of 989139492 is 294931989.

It is an interprime number because it is at equal distance from previous prime (989139491) and next prime (989139493).

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

It is not an unprimeable number, because it can be changed into a prime (989139491) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 14763243 + ... + 14763309.

Almost surely, 2^989139492 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989139492, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1543153920).

989139492 is an abundant number, since it is smaller than the sum of its proper divisors (2097168348).

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

989139492 is a wasteful number, since it uses less digits than its factorization.

989139492 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 168 (or 143 counting only the distinct ones).

The product of its digits is 1259712, while the sum is 54.

The square root of 989139492 is about 31450.5881026095. The cubic root of 989139492 is about 996.3666453892.

The spelling of 989139492 in words is "nine hundred eighty-nine million, one hundred thirty-nine thousand, four hundred ninety-two".