400123343234 has 32 divisors (see below), whose sum is σ = 621479347200. Its totient is φ = 193088076480.

The previous prime is 400123343219. The next prime is 400123343287. The reversal of 400123343234 is 432343321004.

It is a junction number, because it is equal to n+sod(n) for n = 400123343197 and 400123343206.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6063932 + ... + 6129560.

It is an arithmetic number, because the mean of its divisors is an integer number (19421229600).

Almost surely, 2^400123343234 is an apocalyptic number.

400123343234 is a deficient number, since it is larger than the sum of its proper divisors (221356003966).

400123343234 is a wasteful number, since it uses less digits than its factorization.

400123343234 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 66578.

The product of its (nonzero) digits is 20736, while the sum is 29.

Adding to 400123343234 its reverse (432343321004), we get a palindrome (832466664238).

The spelling of 400123343234 in words is "four hundred billion, one hundred twenty-three million, three hundred forty-three thousand, two hundred thirty-four".