30440509 has 4 divisors (see below), whose sum is σ = 33207840. Its totient is φ = 27673180.

The previous prime is 30440483. The next prime is 30440513. The reversal of 30440509 is 90504403.

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, and also an emirpimes, since its reverse is a distinct semiprime: 90504403 = 11 ⋅8227673.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30440509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30440009) 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, 1383649 + ... + 1383670.

It is an arithmetic number, because the mean of its divisors is an integer number (8301960).

Almost surely, 2^30440509 is an apocalyptic number.

It is an amenable number.

30440509 is a deficient number, since it is larger than the sum of its proper divisors (2767331).

30440509 is a wasteful number, since it uses less digits than its factorization.

30440509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2767330.

The product of its (nonzero) digits is 2160, while the sum is 25.

The square root of 30440509 is about 5517.2918175496. The cubic root of 30440509 is about 312.2367156293.

The spelling of 30440509 in words is "thirty million, four hundred forty thousand, five hundred nine".