400344353 has 8 divisors (see below), whose sum is σ = 402453480. Its totient is φ = 398240640.

The previous prime is 400344349. The next prime is 400344367. The reversal of 400344353 is 353443004.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 67354849 + 332989504 = 8207^2 + 18248^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 400344353 - 2² = 400344349 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (400344653) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 279443 + ... + 280871.

It is an arithmetic number, because the mean of its divisors is an integer number (50306685).

Almost surely, 2^400344353 is an apocalyptic number.

It is an amenable number.

400344353 is a deficient number, since it is larger than the sum of its proper divisors (2109127).

400344353 is a wasteful number, since it uses less digits than its factorization.

400344353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2707.

The product of its (nonzero) digits is 8640, while the sum is 26.

The square root of 400344353 is about 20008.6069730004. The cubic root of 400344353 is about 737.0176736334.

Adding to 400344353 its reverse (353443004), we get a palindrome (753787357).

The spelling of 400344353 in words is "four hundred million, three hundred forty-four thousand, three hundred fifty-three".