400345603 has 8 divisors (see below), whose sum is σ = 463051008. Its totient is φ = 339018504.

The previous prime is 400345601. The next prime is 400345643. The reversal of 400345603 is 306543004.

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 400345603 - 2¹ = 400345601 is a prime.

It is not an unprimeable number, because it can be changed into a prime (400345601) 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, 343951 + ... + 345112.

It is an arithmetic number, because the mean of its divisors is an integer number (57881376).

Almost surely, 2^400345603 is an apocalyptic number.

400345603 is a deficient number, since it is larger than the sum of its proper divisors (62705405).

400345603 is an equidigital number, since it uses as much as digits as its factorization.

400345603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 689153.

The product of its (nonzero) digits is 4320, while the sum is 25.

The square root of 400345603 is about 20008.6382095334. The cubic root of 400345603 is about 737.0184406990.

Adding to 400345603 its reverse (306543004), we get a palindrome (706888607).

The spelling of 400345603 in words is "four hundred million, three hundred forty-five thousand, six hundred three".