2628289980 has 36 divisors (see below), whose sum is σ = 7972480152. Its totient is φ = 700877280.

The previous prime is 2628289907. The next prime is 2628289991. The reversal of 2628289980 is 899828262.

2628289980 is a `hidden beast` number, since 2 + 628 + 2 + 8 + 9 + 9 + 8 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7300626 + ... + 7300985.

It is an arithmetic number, because the mean of its divisors is an integer number (221457782).

Almost surely, 2^2628289980 is an apocalyptic number.

2628289980 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2628289980 is an abundant number, since it is smaller than the sum of its proper divisors (5344190172).

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

2628289980 is a wasteful number, since it uses less digits than its factorization.

2628289980 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14601626 (or 14601621 counting only the distinct ones).

The product of its (nonzero) digits is 1990656, while the sum is 54.

The square root of 2628289980 is about 51266.8506932111. The cubic root of 2628289980 is about 1380.0381526944.

The spelling of 2628289980 in words is "two billion, six hundred twenty-eight million, two hundred eighty-nine thousand, nine hundred eighty".