400000033 has 4 divisors (see below), whose sum is σ = 408510720. Its totient is φ = 391489348.

The previous prime is 400000009. The next prime is 400000043. The reversal of 400000033 is 330000004.

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 400000033 - 2⁹ = 399999521 is a prime.

It is a Duffinian number.

400000033 is a modest number, since divided by 33 gives 4 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 399999965 and 400000019.

It is not an unprimeable number, because it can be changed into a prime (400000043) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4255273 + ... + 4255366.

It is an arithmetic number, because the mean of its divisors is an integer number (102127680).

Almost surely, 2^400000033 is an apocalyptic number.

It is an amenable number.

400000033 is a deficient number, since it is larger than the sum of its proper divisors (8510687).

400000033 is an equidigital number, since it uses as much as digits as its factorization.

400000033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8510686.

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

The square root of 400000033 is about 20000.0008250000. Note that the first 3 decimals coincide. The cubic root of 400000033 is about 736.8063199903.

Adding to 400000033 its reverse (330000004), we get a palindrome (730000037).

The spelling of 400000033 in words is "four hundred million, thirty-three", and thus it is an aban number.