400012023 has 16 divisors (see below), whose sum is σ = 565336800. Its totient is φ = 250715136.

The previous prime is 400012007. The next prime is 400012033. The reversal of 400012023 is 320210004.

It is not a de Polignac number, because 400012023 - 2⁴ = 400012007 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400012033) 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, 49761 + ... + 57237.

It is an arithmetic number, because the mean of its divisors is an integer number (35333550).

Almost surely, 2^400012023 is an apocalyptic number.

400012023 is a deficient number, since it is larger than the sum of its proper divisors (165324777).

400012023 is a wasteful number, since it uses less digits than its factorization.

400012023 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8546.

The product of its (nonzero) digits is 48, while the sum is 12.

The square root of 400012023 is about 20000.3005727414. The cubic root of 400012023 is about 736.8136818392.

Adding to 400012023 its reverse (320210004), we get a palindrome (720222027).

It can be divided in two parts, 40001 and 2023, that added together give a palindrome (42024).

The spelling of 400012023 in words is "four hundred million, twelve thousand, twenty-three".