5638781244 has 12 divisors (see below), whose sum is σ = 13157156264. Its totient is φ = 1879593744.

The previous prime is 5638781233. The next prime is 5638781249. The reversal of 5638781244 is 4421878365.

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

It is a junction number, because it is equal to n+sod(n) for n = 5638781193 and 5638781202.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5638781249) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 234949207 + ... + 234949230.

Almost surely, 2^5638781244 is an apocalyptic number.

It is an amenable number.

5638781244 is an abundant number, since it is smaller than the sum of its proper divisors (7518375020).

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

5638781244 is a wasteful number, since it uses less digits than its factorization.

5638781244 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 469898444 (or 469898442 counting only the distinct ones).

The product of its digits is 1290240, while the sum is 48.

The square root of 5638781244 is about 75091.8187554410. The cubic root of 5638781244 is about 1779.8978651998.

The spelling of 5638781244 in words is "five billion, six hundred thirty-eight million, seven hundred eighty-one thousand, two hundred forty-four".