30040442 has 4 divisors (see below), whose sum is σ = 45060666. Its totient is φ = 15020220.

The previous prime is 30040441. The next prime is 30040469. The reversal of 30040442 is 24404003.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24404003 = 13 ⋅1877231.

It can be written as a sum of positive squares in only one way, i.e., 18757561 + 11282881 = 4331^2 + 3359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30040442.

It is not an unprimeable number, because it can be changed into a prime (30040441) 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 as a sum of consecutive naturals, namely, 7510109 + ... + 7510112.

Almost surely, 2^30040442 is an apocalyptic number.

30040442 is a deficient number, since it is larger than the sum of its proper divisors (15020224).

30040442 is a wasteful number, since it uses less digits than its factorization.

30040442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15020223.

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

The square root of 30040442 is about 5480.9161642922. The cubic root of 30040442 is about 310.8628131199.

Adding to 30040442 its reverse (24404003), we get a palindrome (54444445).

The spelling of 30040442 in words is "thirty million, forty thousand, four hundred forty-two".