989748720 has 160 divisors (see below), whose sum is σ = 3451832640. Its totient is φ = 263886336.

The previous prime is 989748671. The next prime is 989748731. The reversal of 989748720 is 27847989.

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

It is a congruent number.

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, 172132 + ... + 177788.

It is an arithmetic number, because the mean of its divisors is an integer number (21573954).

Almost surely, 2^989748720 is an apocalyptic number.

989748720 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 989748720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1725916320).

989748720 is an abundant number, since it is smaller than the sum of its proper divisors (2462083920).

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

989748720 is an equidigital number, since it uses as much as digits as its factorization.

989748720 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5691 (or 5667 counting only the distinct ones).

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

The square root of 989748720 is about 31460.2720903682. The cubic root of 989748720 is about 996.5711631823.

The spelling of 989748720 in words is "nine hundred eighty-nine million, seven hundred forty-eight thousand, seven hundred twenty".