2688909220 has 12 divisors (see below), whose sum is σ = 5646709404. Its totient is φ = 1075563680.

The previous prime is 2688909211. The next prime is 2688909221. The reversal of 2688909220 is 229098862.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 1527871744 + 1161037476 = 39088^2 + 34074^2 .

It is not an unprimeable number, because it can be changed into a prime (2688909221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67222711 + ... + 67222750.

It is an arithmetic number, because the mean of its divisors is an integer number (470559117).

Almost surely, 2^2688909220 is an apocalyptic number.

2688909220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2688909220 is an abundant number, since it is smaller than the sum of its proper divisors (2957800184).

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

2688909220 is a wasteful number, since it uses less digits than its factorization.

2688909220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134445470 (or 134445468 counting only the distinct ones).

The product of its (nonzero) digits is 248832, while the sum is 46.

The square root of 2688909220 is about 51854.6933266411. The cubic root of 2688909220 is about 1390.5674097734.

The spelling of 2688909220 in words is "two billion, six hundred eighty-eight million, nine hundred nine thousand, two hundred twenty".