5440126638 has 16 divisors (see below), whose sum is σ = 10908665856. Its totient is φ = 1808640120.

The previous prime is 5440126631. The next prime is 5440126649. The reversal of 5440126638 is 8366210445.

It is a junction number, because it is equal to n+sod(n) for n = 5440126596 and 5440126605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5440126631) 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, 1181368 + ... + 1185963.

It is an arithmetic number, because the mean of its divisors is an integer number (681791616).

Almost surely, 2^5440126638 is an apocalyptic number.

5440126638 is an abundant number, since it is smaller than the sum of its proper divisors (5468539218).

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

5440126638 is a wasteful number, since it uses less digits than its factorization.

5440126638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2367719.

The product of its (nonzero) digits is 138240, while the sum is 39.

The square root of 5440126638 is about 73757.2141420756. The cubic root of 5440126638 is about 1758.7455159563.

The spelling of 5440126638 in words is "five billion, four hundred forty million, one hundred twenty-six thousand, six hundred thirty-eight".