400243334 has 8 divisors (see below), whose sum is σ = 600745728. Its totient is φ = 199994760.

The previous prime is 400243331. The next prime is 400243339. The reversal of 400243334 is 433342004.

It is a happy number.

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

It is a super-2 number, since 2×400243334² = 320389452822871112, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400243331) 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 3 ways as a sum of consecutive naturals, for example, 59462 + ... + 65849.

It is an arithmetic number, because the mean of its divisors is an integer number (75093216).

Almost surely, 2^400243334 is an apocalyptic number.

400243334 is a deficient number, since it is larger than the sum of its proper divisors (200502394).

400243334 is a wasteful number, since it uses less digits than its factorization.

400243334 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 126910.

The product of its (nonzero) digits is 3456, while the sum is 23.

The square root of 400243334 is about 20006.0824251026. The cubic root of 400243334 is about 736.9556777950.

Adding to 400243334 its reverse (433342004), we get a palindrome (833585338).

The spelling of 400243334 in words is "four hundred million, two hundred forty-three thousand, three hundred thirty-four".