30440023 has 4 divisors (see below), whose sum is σ = 30455368. Its totient is φ = 30424680.

The previous prime is 30440021. The next prime is 30440029. The reversal of 30440023 is 32004403.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30440023 - 2¹ = 30440021 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30439979 and 30440006.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30440021) 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, 4161 + ... + 8842.

It is an arithmetic number, because the mean of its divisors is an integer number (7613842).

Almost surely, 2^30440023 is an apocalyptic number.

30440023 is a deficient number, since it is larger than the sum of its proper divisors (15345).

30440023 is a wasteful number, since it uses less digits than its factorization.

30440023 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15344.

The product of its (nonzero) digits is 288, while the sum is 16.

The square root of 30440023 is about 5517.2477740265. The cubic root of 30440023 is about 312.2350539416.

Adding to 30440023 its reverse (32004403), we get a palindrome (62444426).

The spelling of 30440023 in words is "thirty million, four hundred forty thousand, twenty-three".