6390244044 has 18 divisors (see below), whose sum is σ = 16153116980. Its totient is φ = 2130081336.

The previous prime is 6390244009. The next prime is 6390244057. The reversal of 6390244044 is 4404420936.

It is a tau number, because it is divible by the number of its divisors (18).

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 177506779 = 6390244044 / (6 + 3 + 9 + 0 + 2 + 4 + 4 + 0 + 4 + 4).

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 88753354 + ... + 88753425.

Almost surely, 2^6390244044 is an apocalyptic number.

It is an amenable number.

6390244044 is an abundant number, since it is smaller than the sum of its proper divisors (9762872936).

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

6390244044 is a wasteful number, since it uses less digits than its factorization.

6390244044 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177506789 (or 177506784 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 36.

The square root of 6390244044 is about 79939.0020202904. The cubic root of 6390244044 is about 1855.6916550008.

The spelling of 6390244044 in words is "six billion, three hundred ninety million, two hundred forty-four thousand, forty-four".