30440855 has 4 divisors (see below), whose sum is σ = 36529032. Its totient is φ = 24352680.

The previous prime is 30440843. The next prime is 30440857. The reversal of 30440855 is 55804403.

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

It is a de Polignac number, because none of the positive numbers 2^k-30440855 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 (30440857) 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, 3044081 + ... + 3044090.

It is an arithmetic number, because the mean of its divisors is an integer number (9132258).

Almost surely, 2^30440855 is an apocalyptic number.

30440855 is a deficient number, since it is larger than the sum of its proper divisors (6088177).

30440855 is an equidigital number, since it uses as much as digits as its factorization.

30440855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6088176.

The product of its (nonzero) digits is 9600, while the sum is 29.

The square root of 30440855 is about 5517.3231734239. The cubic root of 30440855 is about 312.2378986307.

The spelling of 30440855 in words is "thirty million, four hundred forty thousand, eight hundred fifty-five".