2144578860 has 36 divisors (see below), whose sum is σ = 6505223088. Its totient is φ = 571887648.

The previous prime is 2144578837. The next prime is 2144578871. The reversal of 2144578860 is 688754412.

2144578860 is a `hidden beast` number, since 2 + 14 + 4 + 578 + 8 + 60 = 666.

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

It is a Harshad number since it is a multiple of its sum of digits (45).

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, 5956984 + ... + 5957343.

Almost surely, 2^2144578860 is an apocalyptic number.

2144578860 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144578860 is an abundant number, since it is smaller than the sum of its proper divisors (4360644228).

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

2144578860 is a wasteful number, since it uses less digits than its factorization.

2144578860 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11914342 (or 11914337 counting only the distinct ones).

The product of its (nonzero) digits is 430080, while the sum is 45.

The square root of 2144578860 is about 46309.5979252681. The cubic root of 2144578860 is about 1289.5771825046.

The spelling of 2144578860 in words is "two billion, one hundred forty-four million, five hundred seventy-eight thousand, eight hundred sixty".