9871799280 has 80 divisors (see below), whose sum is σ = 34974380544. Its totient is φ = 2256410880.

The previous prime is 9871799279. The next prime is 9871799291. The reversal of 9871799280 is 829971789.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (60).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2936356 + ... + 2939715.

Almost surely, 2^9871799280 is an apocalyptic number.

It is an amenable number.

9871799280 is an abundant number, since it is smaller than the sum of its proper divisors (25102581264).

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

9871799280 is a wasteful number, since it uses less digits than its factorization.

9871799280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5876094 (or 5876088 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 60.

The square root of 9871799280 is about 99356.9286964930. The cubic root of 9871799280 is about 2145.1883947308.

The spelling of 9871799280 in words is "nine billion, eight hundred seventy-one million, seven hundred ninety-nine thousand, two hundred eighty".