2687209220 has 12 divisors (see below), whose sum is σ = 5643139404. Its totient is φ = 1074883680.

The previous prime is 2687209211. The next prime is 2687209243. The reversal of 2687209220 is 229027862.

It can be written as a sum of positive squares in 2 ways, for example, as 958645444 + 1728563776 = 30962^2 + 41576^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 67180211 + ... + 67180250.

It is an arithmetic number, because the mean of its divisors is an integer number (470261617).

Almost surely, 2^2687209220 is an apocalyptic number.

2687209220 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2687209220 is an abundant number, since it is smaller than the sum of its proper divisors (2955930184).

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

2687209220 is a wasteful number, since it uses less digits than its factorization.

2687209220 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 134360470 (or 134360468 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 38.

The square root of 2687209220 is about 51838.2987760980. The cubic root of 2687209220 is about 1390.2742967469.

The spelling of 2687209220 in words is "two billion, six hundred eighty-seven million, two hundred nine thousand, two hundred twenty".