980138880 has 640 divisors, whose sum is σ = 4164684480. Its totient is φ = 214990848.

The previous prime is 980138851. The next prime is 980138881. The reversal of 980138880 is 88831089.

It is a tau number, because it is divible by the number of its divisors (640).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (980138881) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 13426524 + ... + 13426596.

Almost surely, 2^980138880 is an apocalyptic number.

980138880 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 980138880, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2082342240).

980138880 is an abundant number, since it is smaller than the sum of its proper divisors (3184545600).

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

980138880 is a wasteful number, since it uses less digits than its factorization.

980138880 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148 (or 127 counting only the distinct ones).

The product of its (nonzero) digits is 110592, while the sum is 45.

The square root of 980138880 is about 31307.1697858494. The cubic root of 980138880 is about 993.3353072145.

The spelling of 980138880 in words is "nine hundred eighty million, one hundred thirty-eight thousand, eight hundred eighty".