400343442 has 8 divisors (see below), whose sum is σ = 800686896. Its totient is φ = 133447812.

The previous prime is 400343429. The next prime is 400343473. The reversal of 400343442 is 244343004.

It is a happy number.

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

400343442 is an admirable number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33361948 + ... + 33361959.

It is an arithmetic number, because the mean of its divisors is an integer number (100085862).

Almost surely, 2^400343442 is an apocalyptic number.

400343442 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

400343442 is a wasteful number, since it uses less digits than its factorization.

400343442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66723912.

The product of its (nonzero) digits is 4608, while the sum is 24.

The square root of 400343442 is about 20008.5842077844. The cubic root of 400343442 is about 737.0171145950.

Adding to 400343442 its reverse (244343004), we get a palindrome (644686446).

The spelling of 400343442 in words is "four hundred million, three hundred forty-three thousand, four hundred forty-two".