400044330023 has 4 divisors (see below), whose sum is σ = 430816970808. Its totient is φ = 369271689240.

The previous prime is 400044330011. The next prime is 400044330029. The reversal of 400044330023 is 320033440004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400044330023 - 2²⁰ = 400043281447 is a prime.

It is a super-3 number, since 3×400044330023³ (a number of 36 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400044330029) 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, 15386320373 + ... + 15386320398.

It is an arithmetic number, because the mean of its divisors is an integer number (107704242702).

Almost surely, 2^400044330023 is an apocalyptic number.

400044330023 is a deficient number, since it is larger than the sum of its proper divisors (30772640785).

400044330023 is a wasteful number, since it uses less digits than its factorization.

400044330023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30772640784.

The product of its (nonzero) digits is 3456, while the sum is 23.

Adding to 400044330023 its reverse (320033440004), we get a palindrome (720077770027).

The spelling of 400044330023 in words is "four hundred billion, forty-four million, three hundred thirty thousand, twenty-three".