400040400023 has 16 divisors (see below), whose sum is σ = 450549722112. Its totient is φ = 351891432000.

The previous prime is 400040399981. The next prime is 400040400047. The reversal of 400040400023 is 320004040004.

It is a cyclic number.

It is not a de Polignac number, because 400040400023 - 2⁶ = 400040399959 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400040399974 and 400040400010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400040400073) 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, 2416340 + ... + 2576582.

It is an arithmetic number, because the mean of its divisors is an integer number (28159357632).

Almost surely, 2^400040400023 is an apocalyptic number.

400040400023 is a deficient number, since it is larger than the sum of its proper divisors (50509322089).

400040400023 is a wasteful number, since it uses less digits than its factorization.

400040400023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167606.

The product of its (nonzero) digits is 384, while the sum is 17.

Adding to 400040400023 its reverse (320004040004), we get a palindrome (720044440027).

The spelling of 400040400023 in words is "four hundred billion, forty million, four hundred thousand, twenty-three".