6438528044 has 24 divisors (see below), whose sum is σ = 12184521888. Its totient is φ = 2959292160.

The previous prime is 6438528037. The next prime is 6438528049. The reversal of 6438528044 is 4408258346.

It is a Smith number, since the sum of its digits (44) coincides with the sum of the digits of its prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 6438527986 and 6438528004.

It is not an unprimeable number, because it can be changed into a prime (6438528049) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 244352 + ... + 269415.

It is an arithmetic number, because the mean of its divisors is an integer number (507688412).

Almost surely, 2^6438528044 is an apocalyptic number.

It is an amenable number.

6438528044 is a deficient number, since it is larger than the sum of its proper divisors (5745993844).

6438528044 is a wasteful number, since it uses less digits than its factorization.

6438528044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 514025 (or 514023 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 44.

The square root of 6438528044 is about 80240.4389569250. The cubic root of 6438528044 is about 1860.3537350887.

It can be divided in two parts, 64385 and 28044, that added together give a palindrome (92429).

The spelling of 6438528044 in words is "six billion, four hundred thirty-eight million, five hundred twenty-eight thousand, forty-four".