2184253638 has 64 divisors (see below), whose sum is σ = 5062487040. Its totient is φ = 615388032.

The previous prime is 2184253633. The next prime is 2184253681. The reversal of 2184253638 is 8363524812.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a self number, because there is not a number n which added to its sum of digits gives 2184253638.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2184253633) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1162756 + ... + 1164632.

It is an arithmetic number, because the mean of its divisors is an integer number (79101360).

Almost surely, 2^2184253638 is an apocalyptic number.

2184253638 is an abundant number, since it is smaller than the sum of its proper divisors (2878233402).

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

2184253638 is a wasteful number, since it uses less digits than its factorization.

2184253638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2261.

The product of its digits is 276480, while the sum is 42.

The square root of 2184253638 is about 46735.9993794933. Note that the first 3 decimals coincide. The cubic root of 2184253638 is about 1297.4810469423.

The spelling of 2184253638 in words is "two billion, one hundred eighty-four million, two hundred fifty-three thousand, six hundred thirty-eight".