42440033 has 4 divisors (see below), whose sum is σ = 42481920. Its totient is φ = 42398148.

The previous prime is 42440029. The next prime is 42440039. The reversal of 42440033 is 33004424.

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 42440033 - 2² = 42440029 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 42439987 and 42440014.

It is not an unprimeable number, because it can be changed into a prime (42440039) 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, 19385 + ... + 21462.

It is an arithmetic number, because the mean of its divisors is an integer number (10620480).

Almost surely, 2^42440033 is an apocalyptic number.

It is an amenable number.

42440033 is a deficient number, since it is larger than the sum of its proper divisors (41887).

42440033 is a wasteful number, since it uses less digits than its factorization.

42440033 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41886.

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

The square root of 42440033 is about 6514.6015227334. The cubic root of 42440033 is about 348.8123911277.

Adding to 42440033 its reverse (33004424), we get a palindrome (75444457).

The spelling of 42440033 in words is "forty-two million, four hundred forty thousand, thirty-three".