30440219 has 4 divisors (see below), whose sum is σ = 30453120. Its totient is φ = 30427320.

The previous prime is 30440213. The next prime is 30440239. The reversal of 30440219 is 91204403.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 30440219 - 2⁸ = 30439963 is a prime.

It is a super-2 number, since 2×30440219² = 1853213865535922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30440194 and 30440203.

It is not an unprimeable number, because it can be changed into a prime (30440213) 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, 1787 + ... + 8004.

It is an arithmetic number, because the mean of its divisors is an integer number (7613280).

Almost surely, 2^30440219 is an apocalyptic number.

30440219 is a deficient number, since it is larger than the sum of its proper divisors (12901).

30440219 is an equidigital number, since it uses as much as digits as its factorization.

30440219 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12900.

The product of its (nonzero) digits is 864, while the sum is 23.

The square root of 30440219 is about 5517.2655364773. The cubic root of 30440219 is about 312.2357240894.

The spelling of 30440219 in words is "thirty million, four hundred forty thousand, two hundred nineteen".