30440242 has 32 divisors (see below), whose sum is σ = 55255680. Its totient is φ = 12320208.

The previous prime is 30440239. The next prime is 30440257. The reversal of 30440242 is 24204403.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 95868 + ... + 96184.

It is an arithmetic number, because the mean of its divisors is an integer number (1726740).

Almost surely, 2^30440242 is an apocalyptic number.

30440242 is a deficient number, since it is larger than the sum of its proper divisors (24815438).

30440242 is an equidigital number, since it uses as much as digits as its factorization.

30440242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 383 (or 345 counting only the distinct ones).

The product of its (nonzero) digits is 768, while the sum is 19.

The square root of 30440242 is about 5517.2676208428. The cubic root of 30440242 is about 312.2358027290.

Adding to 30440242 its reverse (24204403), we get a palindrome (54644645).

The spelling of 30440242 in words is "thirty million, four hundred forty thousand, two hundred forty-two".