4440042123 has 12 divisors (see below), whose sum is σ = 6507169704. Its totient is φ = 2690934400.

The previous prime is 4440042097. The next prime is 4440042137. The reversal of 4440042123 is 3212400444.

It is a happy number.

It is not a de Polignac number, because 4440042123 - 2⁹ = 4440041611 is a prime.

It is a Smith number, since the sum of its digits (24) 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 = 4440042093 and 4440042102.

It is not an unprimeable number, because it can be changed into a prime (4440042163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6115398 + ... + 6116123.

It is an arithmetic number, because the mean of its divisors is an integer number (542264142).

Almost surely, 2^4440042123 is an apocalyptic number.

4440042123 is a deficient number, since it is larger than the sum of its proper divisors (2067127581).

4440042123 is a wasteful number, since it uses less digits than its factorization.

4440042123 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12231546 (or 12231535 counting only the distinct ones).

The product of its (nonzero) digits is 3072, while the sum is 24.

The square root of 4440042123 is about 66633.6410756609. The cubic root of 4440042123 is about 1643.5983506372.

Adding to 4440042123 its reverse (3212400444), we get a palindrome (7652442567).

It can be divided in two parts, 44400421 and 23, that added together give a palindrome (44400444).

The spelling of 4440042123 in words is "four billion, four hundred forty million, forty-two thousand, one hundred twenty-three".