30440042 has 8 divisors (see below), whose sum is σ = 45924516. Its totient is φ = 15131872.

The previous prime is 30440041. The next prime is 30440083. The reversal of 30440042 is 24004403.

It can be written as a sum of positive squares in 2 ways, for example, as 21613201 + 8826841 = 4649^2 + 2971^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 30440042.

It is not an unprimeable number, because it can be changed into a prime (30440041) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 43643 + ... + 44334.

Almost surely, 2^30440042 is an apocalyptic number.

30440042 is a deficient number, since it is larger than the sum of its proper divisors (15484474).

30440042 is a wasteful number, since it uses less digits than its factorization.

30440042 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 88152.

The product of its (nonzero) digits is 384, while the sum is 17.

The square root of 30440042 is about 5517.2494958992. The cubic root of 30440042 is about 312.2351189051.

Adding to 30440042 its reverse (24004403), we get a palindrome (54444445).

The spelling of 30440042 in words is "thirty million, four hundred forty thousand, forty-two".