400404533 has 4 divisors (see below), whose sum is σ = 405228768. Its totient is φ = 395580300.

The previous prime is 400404523. The next prime is 400404551. The reversal of 400404533 is 335404004.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 400404533 - 2¹² = 400400437 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 400404499 and 400404508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (400404523) 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, 2411993 + ... + 2412158.

It is an arithmetic number, because the mean of its divisors is an integer number (101307192).

Almost surely, 2^400404533 is an apocalyptic number.

It is an amenable number.

400404533 is a deficient number, since it is larger than the sum of its proper divisors (4824235).

400404533 is an equidigital number, since it uses as much as digits as its factorization.

400404533 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4824234.

The product of its (nonzero) digits is 2880, while the sum is 23.

The square root of 400404533 is about 20010.1107693086. The cubic root of 400404533 is about 737.0546014274.

Adding to 400404533 its reverse (335404004), we get a palindrome (735808537).

The spelling of 400404533 in words is "four hundred million, four hundred four thousand, five hundred thirty-three".