989472780 has 96 divisors (see below), whose sum is σ = 3085145280. Its totient is φ = 263278080.

The previous prime is 989472769. The next prime is 989472791. The reversal of 989472780 is 87274989.

989472780 is a `hidden beast` number, since 98 + 9 + 472 + 7 + 80 = 666.

It is an interprime number because it is at equal distance from previous prime (989472769) and next prime (989472791).

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

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 279582 + ... + 283098.

It is an arithmetic number, because the mean of its divisors is an integer number (32136930).

Almost surely, 2^989472780 is an apocalyptic number.

989472780 is a gapful number since it is divisible by the number (90) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 989472780, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1542572640).

989472780 is an abundant number, since it is smaller than the sum of its proper divisors (2095672500).

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

989472780 is a wasteful number, since it uses less digits than its factorization.

989472780 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4056 (or 4048 counting only the distinct ones).

The product of its (nonzero) digits is 2032128, while the sum is 54.

The square root of 989472780 is about 31455.8862536092. The cubic root of 989472780 is about 996.4785405461.

The spelling of 989472780 in words is "nine hundred eighty-nine million, four hundred seventy-two thousand, seven hundred eighty".