30440261 has 4 divisors (see below), whose sum is σ = 32042400. Its totient is φ = 28838124.

The previous prime is 30440257. The next prime is 30440269. The reversal of 30440261 is 16204403.

It is a happy number.

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.

It is not a de Polignac number, because 30440261 - 2² = 30440257 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 (30440269) 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 in 3 ways as a sum of consecutive naturals, for example, 801041 + ... + 801078.

It is an arithmetic number, because the mean of its divisors is an integer number (8010600).

Almost surely, 2^30440261 is an apocalyptic number.

It is an amenable number.

30440261 is a deficient number, since it is larger than the sum of its proper divisors (1602139).

30440261 is a wasteful number, since it uses less digits than its factorization.

30440261 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1602138.

The product of its (nonzero) digits is 576, while the sum is 20.

The square root of 30440261 is about 5517.2693427093. The cubic root of 30440261 is about 312.2358676921.

Adding to 30440261 its reverse (16204403), we get a palindrome (46644664).

The spelling of 30440261 in words is "thirty million, four hundred forty thousand, two hundred sixty-one".