400023143 has 8 divisors (see below), whose sum is σ = 432600000. Its totient is φ = 367704288.

The previous prime is 400023139. The next prime is 400023161. The reversal of 400023143 is 341320004.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 400023143 - 2² = 400023139 is a prime.

It is a super-3 number, since 3×400023143³ (a number of 27 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400023343) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 61268 + ... + 67481.

It is an arithmetic number, because the mean of its divisors is an integer number (54075000).

Almost surely, 2^400023143 is an apocalyptic number.

400023143 is a deficient number, since it is larger than the sum of its proper divisors (32576857).

400023143 is a wasteful number, since it uses less digits than its factorization.

400023143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 129001.

The product of its (nonzero) digits is 288, while the sum is 17.

The square root of 400023143 is about 20000.5785666315. The cubic root of 400023143 is about 736.8205093775.

Adding to 400023143 its reverse (341320004), we get a palindrome (741343147).

The spelling of 400023143 in words is "four hundred million, twenty-three thousand, one hundred forty-three".