1980684288 has 144 divisors (see below), whose sum is σ = 6241271400. Its totient is φ = 600145920.

The previous prime is 1980684283. The next prime is 1980684289. The reversal of 1980684288 is 8824860891.

It is a tau number, because it is divible by the number of its divisors (144).

It is a super-2 number, since 2×1980684288² = 7846220497460133888, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1980684283) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 197868 + ... + 207636.

Almost surely, 2^1980684288 is an apocalyptic number.

1980684288 is a gapful number since it is divisible by the number (18) 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 1980684288, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3120635700).

1980684288 is an abundant number, since it is smaller than the sum of its proper divisors (4260587112).

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

1980684288 is a wasteful number, since it uses less digits than its factorization.

1980684288 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9808 (or 9785 counting only the distinct ones).

The product of its (nonzero) digits is 1769472, while the sum is 54.

The square root of 1980684288 is about 44504.8793729407. The cubic root of 1980684288 is about 1255.8518764561.

The spelling of 1980684288 in words is "one billion, nine hundred eighty million, six hundred eighty-four thousand, two hundred eighty-eight".