2005644120 has 32 divisors (see below), whose sum is σ = 6016932720. Its totient is φ = 534838400.

The previous prime is 2005644079. The next prime is 2005644131. The reversal of 2005644120 is 214465002.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 8356731 + ... + 8356970.

Almost surely, 2^2005644120 is an apocalyptic number.

2005644120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2005644120 is an abundant number, since it is smaller than the sum of its proper divisors (4011288600).

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

2005644120 is a wasteful number, since it uses less digits than its factorization.

2005644120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16713715 (or 16713711 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2005644120 is about 44784.4182724304. The cubic root of 2005644120 is about 1261.1051276789.

The spelling of 2005644120 in words is "two billion, five million, six hundred forty-four thousand, one hundred twenty".