400024343 has 4 divisors (see below), whose sum is σ = 400658928. Its totient is φ = 399389760.

The previous prime is 400024333. The next prime is 400024357. The reversal of 400024343 is 343420004.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 400024343 - 2⁴ = 400024327 is a prime.

It is a super-3 number, since 3×400024343³ (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 (400024333) 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 3 ways as a sum of consecutive naturals, for example, 316346 + ... + 317607.

It is an arithmetic number, because the mean of its divisors is an integer number (100164732).

Almost surely, 2^400024343 is an apocalyptic number.

400024343 is a deficient number, since it is larger than the sum of its proper divisors (634585).

400024343 is an equidigital number, since it uses as much as digits as its factorization.

400024343 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 634584.

The product of its (nonzero) digits is 1152, while the sum is 20.

The square root of 400024343 is about 20000.6085657412. The cubic root of 400024343 is about 736.8212461547.

Adding to 400024343 its reverse (343420004), we get a palindrome (743444347).

The spelling of 400024343 in words is "four hundred million, twenty-four thousand, three hundred forty-three".