400344234344 has 64 divisors (see below), whose sum is σ = 805528800000. Its totient is φ = 185978827008.

The previous prime is 400344234337. The next prime is 400344234349. The reversal of 400344234344 is 443432443004.

It is a super-2 number, since 2×400344234344² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (400344234349) 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, 1677314 + ... + 1901070.

It is an arithmetic number, because the mean of its divisors is an integer number (12586387500).

Almost surely, 2^400344234344 is an apocalyptic number.

It is an amenable number.

400344234344 is an abundant number, since it is smaller than the sum of its proper divisors (405184565656).

400344234344 is a wasteful number, since it uses less digits than its factorization.

400344234344 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 224010 (or 224006 counting only the distinct ones).

The product of its (nonzero) digits is 221184, while the sum is 35.

Adding to 400344234344 its reverse (443432443004), we get a palindrome (843776677348).

The spelling of 400344234344 in words is "four hundred billion, three hundred forty-four million, two hundred thirty-four thousand, three hundred forty-four".