989217792 has 176 divisors, whose sum is σ = 3011873920. Its totient is φ = 320495616.

The previous prime is 989217791. The next prime is 989217793. The reversal of 989217792 is 297712989.

It is an interprime number because it is at equal distance from previous prime (989217791) and next prime (989217793).

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 (989217791) 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, 1022493 + ... + 1023459.

It is an arithmetic number, because the mean of its divisors is an integer number (17112920).

Almost surely, 2^989217792 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 989217792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1505936960).

989217792 is an abundant number, since it is smaller than the sum of its proper divisors (2022656128).

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

989217792 is a wasteful number, since it uses less digits than its factorization.

989217792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1033 (or 1009 counting only the distinct ones).

The product of its digits is 1143072, while the sum is 54.

The square root of 989217792 is about 31451.8328877667. The cubic root of 989217792 is about 996.3929353953.

The spelling of 989217792 in words is "nine hundred eighty-nine million, two hundred seventeen thousand, seven hundred ninety-two".