400340234243 has 16 divisors (see below), whose sum is σ = 421153996800. Its totient is φ = 379812144096.

The previous prime is 400340234233. The next prime is 400340234339. The reversal of 400340234243 is 342432043004.

It is a cyclic number.

It is not a de Polignac number, because 400340234243 - 2¹⁰ = 400340233219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400340234233) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11570333 + ... + 11604881.

It is an arithmetic number, because the mean of its divisors is an integer number (26322124800).

Almost surely, 2^400340234243 is an apocalyptic number.

400340234243 is a deficient number, since it is larger than the sum of its proper divisors (20813762557).

400340234243 is a wasteful number, since it uses less digits than its factorization.

400340234243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38666.

The product of its (nonzero) digits is 27648, while the sum is 29.

Adding to 400340234243 its reverse (342432043004), we get a palindrome (742772277247).

The spelling of 400340234243 in words is "four hundred billion, three hundred forty million, two hundred thirty-four thousand, two hundred forty-three".