400303 has 8 divisors (see below), whose sum is σ = 425600. Its totient is φ = 375840.

The previous prime is 400297. The next prime is 400307. The reversal of 400303 is 303004.

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 400303 - 2¹³ = 392111 is a prime.

It is a Duffinian number.

400303 is a modest number, since divided by 303 gives 40 as remainder.

It is a self number, because there is not a number n which added to its sum of digits gives 400303.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400307) 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, 973 + ... + 1321.

It is an arithmetic number, because the mean of its divisors is an integer number (53200).

2⁴⁰⁰³⁰³ is an apocalyptic number.

400303 is a deficient number, since it is larger than the sum of its proper divisors (25297).

400303 is a wasteful number, since it uses less digits than its factorization.

400303 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 417.

The product of its (nonzero) digits is 36, while the sum is 10.

The square root of 400303 is about 632.6950292202. The cubic root of 400303 is about 73.6992296363.

Adding to 400303 its reverse (303004), we get a palindrome (703307).

It can be divided in two parts, 400 and 303, that added together give a triangular number (703 = T₃₇).

The spelling of 400303 in words is "four hundred thousand, three hundred three", and thus it is an iban number.