400323143 has 8 divisors (see below), whose sum is σ = 437978880. Its totient is φ = 362877880.

The previous prime is 400323137. The next prime is 400323149. The reversal of 400323143 is 341323004.

It is an interprime number because it is at equal distance from previous prime (400323137) and next prime (400323149).

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 400323143 - 2⁸ = 400322887 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400323149) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48623 + ... + 56256.

It is an arithmetic number, because the mean of its divisors is an integer number (54747360).

Almost surely, 2^400323143 is an apocalyptic number.

400323143 is a deficient number, since it is larger than the sum of its proper divisors (37655737).

400323143 is a wasteful number, since it uses less digits than its factorization.

400323143 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105237.

The product of its (nonzero) digits is 864, while the sum is 20.

The square root of 400323143 is about 20008.0769440744. The cubic root of 400323143 is about 737.0046578211.

Adding to 400323143 its reverse (341323004), we get a palindrome (741646147).

The spelling of 400323143 in words is "four hundred million, three hundred twenty-three thousand, one hundred forty-three".