2144578920 has 64 divisors (see below), whose sum is σ = 7018626240. Its totient is φ = 519897600.

The previous prime is 2144578901. The next prime is 2144578937. The reversal of 2144578920 is 298754412.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 811021 + ... + 813660.

It is an arithmetic number, because the mean of its divisors is an integer number (109666035).

Almost surely, 2^2144578920 is an apocalyptic number.

2144578920 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2144578920 is an abundant number, since it is smaller than the sum of its proper divisors (4874047320).

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

2144578920 is a wasteful number, since it uses less digits than its factorization.

2144578920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1624706 (or 1624702 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 42.

The square root of 2144578920 is about 46309.5985730820. The cubic root of 2144578920 is about 1289.5771945310.

The spelling of 2144578920 in words is "two billion, one hundred forty-four million, five hundred seventy-eight thousand, nine hundred twenty".