400444143423 has 8 divisors (see below), whose sum is σ = 533928616368. Its totient is φ = 266961216384.

The previous prime is 400444143401. The next prime is 400444143439. The reversal of 400444143423 is 324341444004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 400444143423 - 2⁵ = 400444143391 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400444143443) 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, 525111 + ... + 1037607.

It is an arithmetic number, because the mean of its divisors is an integer number (66741077046).

Almost surely, 2^400444143423 is an apocalyptic number.

400444143423 is a deficient number, since it is larger than the sum of its proper divisors (133484472945).

400444143423 is a wasteful number, since it uses less digits than its factorization.

400444143423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 772953.

The product of its (nonzero) digits is 73728, while the sum is 33.

Adding to 400444143423 its reverse (324341444004), we get a palindrome (724785587427).

The spelling of 400444143423 in words is "four hundred billion, four hundred forty-four million, one hundred forty-three thousand, four hundred twenty-three".