400401143 has 4 divisors (see below), whose sum is σ = 400442328. Its totient is φ = 400359960.

The previous prime is 400401137. The next prime is 400401191. The reversal of 400401143 is 341104004.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 400401143 - 2⁸ = 400400887 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 (400401103) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3005 + ... + 28457.

It is an arithmetic number, because the mean of its divisors is an integer number (100110582).

Almost surely, 2^400401143 is an apocalyptic number.

400401143 is a deficient number, since it is larger than the sum of its proper divisors (41185).

400401143 is a wasteful number, since it uses less digits than its factorization.

400401143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41184.

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 400401143 is about 20010.0260619520. The cubic root of 400401143 is about 737.0525213459.

Adding to 400401143 its reverse (341104004), we get a palindrome (741505147).

The spelling of 400401143 in words is "four hundred million, four hundred one thousand, one hundred forty-three".