400403233 has 4 divisors (see below), whose sum is σ = 411224980. Its totient is φ = 389581488.

The previous prime is 400403231. The next prime is 400403243. The reversal of 400403233 is 332304004.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 341067024 + 59336209 = 18468^2 + 7703^2 .

It is a cyclic number.

It is not a de Polignac number, because 400403233 - 2¹ = 400403231 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 400403233.

It is not an unprimeable number, because it can be changed into a prime (400403231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5410818 + ... + 5410891.

It is an arithmetic number, because the mean of its divisors is an integer number (102806245).

Almost surely, 2^400403233 is an apocalyptic number.

It is an amenable number.

400403233 is a deficient number, since it is larger than the sum of its proper divisors (10821747).

400403233 is a wasteful number, since it uses less digits than its factorization.

400403233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10821746.

The product of its (nonzero) digits is 864, while the sum is 19.

The square root of 400403233 is about 20010.0782857039. The cubic root of 400403233 is about 737.0538037574.

Adding to 400403233 its reverse (332304004), we get a palindrome (732707237).

The spelling of 400403233 in words is "four hundred million, four hundred three thousand, two hundred thirty-three".