7989601280 has 88 divisors (see below), whose sum is σ = 19240244280. Its totient is φ = 3183411200.

The previous prime is 7989601271. The next prime is 7989601309. The reversal of 7989601280 is 821069897.

It can be written as a sum of positive squares in 4 ways, for example, as 1131111424 + 6858489856 = 33632^2 + 82816^2 .

It is a super-2 number, since 2×7989601280² (a number of 21 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1374380 + ... + 1380180.

Almost surely, 2^7989601280 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 7989601280, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (9620122140).

7989601280 is an abundant number, since it is smaller than the sum of its proper divisors (11250643000).

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

7989601280 is a wasteful number, since it uses less digits than its factorization.

7989601280 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6095 (or 6077 counting only the distinct ones).

The product of its (nonzero) digits is 435456, while the sum is 50.

The square root of 7989601280 is about 89384.5695855834. The cubic root of 7989601280 is about 1999.1330642655.

The spelling of 7989601280 in words is "seven billion, nine hundred eighty-nine million, six hundred one thousand, two hundred eighty".