400442303 has 16 divisors (see below), whose sum is σ = 418283520. Its totient is φ = 383092416.

The previous prime is 400442299. The next prime is 400442311. The reversal of 400442303 is 303244004.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 400442303 - 2² = 400442299 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400442323) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 435278 + ... + 436196.

It is an arithmetic number, because the mean of its divisors is an integer number (26142720).

Almost surely, 2^400442303 is an apocalyptic number.

400442303 is a deficient number, since it is larger than the sum of its proper divisors (17841217).

400442303 is a wasteful number, since it uses less digits than its factorization.

400442303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1166.

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

The square root of 400442303 is about 20011.0545199397. The cubic root of 400442303 is about 737.0777760543.

Adding to 400442303 its reverse (303244004), we get a palindrome (703686307).

The spelling of 400442303 in words is "four hundred million, four hundred forty-two thousand, three hundred three".