989251380 has 240 divisors, whose sum is σ = 3380952960. Its totient is φ = 240682752.

The previous prime is 989251363. The next prime is 989251411. The reversal of 989251380 is 83152989.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 2253201 + ... + 2253639.

It is an arithmetic number, because the mean of its divisors is an integer number (14087304).

Almost surely, 2^989251380 is an apocalyptic number.

989251380 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 989251380, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1690476480).

989251380 is an abundant number, since it is smaller than the sum of its proper divisors (2391701580).

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

989251380 is a wasteful number, since it uses less digits than its factorization.

989251380 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 580 (or 569 counting only the distinct ones).

The product of its (nonzero) digits is 155520, while the sum is 45.

The square root of 989251380 is about 31452.3668425764. The cubic root of 989251380 is about 996.4042124762.

The spelling of 989251380 in words is "nine hundred eighty-nine million, two hundred fifty-one thousand, three hundred eighty".