402440033 has 4 divisors (see below), whose sum is σ = 402961428. Its totient is φ = 401918640.

The previous prime is 402440029. The next prime is 402440041. The reversal of 402440033 is 330044204.

It is a happy number.

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 134397649 + 268042384 = 11593^2 + 16372^2 .

It is a cyclic number.

It is not a de Polignac number, because 402440033 - 2² = 402440029 is a prime.

It is a super-2 number, since 2×402440033² = 323915960322082178, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 402439987 and 402440014.

It is not an unprimeable number, because it can be changed into a prime (402440023) 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, 259538 + ... + 261083.

It is an arithmetic number, because the mean of its divisors is an integer number (100740357).

Almost surely, 2^402440033 is an apocalyptic number.

It is an amenable number.

402440033 is a deficient number, since it is larger than the sum of its proper divisors (521395).

402440033 is an equidigital number, since it uses as much as digits as its factorization.

402440033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 521394.

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

The square root of 402440033 is about 20060.9080801443. The cubic root of 402440033 is about 738.3014567147.

Adding to 402440033 its reverse (330044204), we get a palindrome (732484237).

The spelling of 402440033 in words is "four hundred two million, four hundred forty thousand, thirty-three".