2687218428 has 12 divisors (see below), whose sum is σ = 6270176360. Its totient is φ = 895739472.

The previous prime is 2687218411. The next prime is 2687218453. The reversal of 2687218428 is 8248127862.

2687218428 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (12).

It is a super-2 number, since 2×2687218428² = 14442285759565582368, which contains 22 as substring.

It is a congruent number.

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, 111967423 + ... + 111967446.

Almost surely, 2^2687218428 is an apocalyptic number.

It is an amenable number.

2687218428 is an abundant number, since it is smaller than the sum of its proper divisors (3582957932).

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

2687218428 is a wasteful number, since it uses less digits than its factorization.

2687218428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 223934876 (or 223934874 counting only the distinct ones).

The product of its digits is 688128, while the sum is 48.

The square root of 2687218428 is about 51838.3875906649. The cubic root of 2687218428 is about 1390.2758847179.

The spelling of 2687218428 in words is "two billion, six hundred eighty-seven million, two hundred eighteen thousand, four hundred twenty-eight".