400321743 has 8 divisors (see below), whose sum is σ = 535031856. Its totient is φ = 266246400.

The previous prime is 400321741. The next prime is 400321751. The reversal of 400321743 is 347123004.

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

It is not a de Polignac number, because 400321743 - 2¹ = 400321741 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400321741) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 157218 + ... + 159743.

It is an arithmetic number, because the mean of its divisors is an integer number (66878982).

Almost surely, 2^400321743 is an apocalyptic number.

400321743 is a deficient number, since it is larger than the sum of its proper divisors (134710113).

400321743 is a wasteful number, since it uses less digits than its factorization.

400321743 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 317385.

The product of its (nonzero) digits is 2016, while the sum is 24.

The square root of 400321743 is about 20008.0419581727. The cubic root of 400321743 is about 737.0037986754.

Adding to 400321743 its reverse (347123004), we get a palindrome (747444747).

The spelling of 400321743 in words is "four hundred million, three hundred twenty-one thousand, seven hundred forty-three".