30420805 has 8 divisors (see below), whose sum is σ = 38426400. Its totient is φ = 23055696.

The previous prime is 30420799. The next prime is 30420809. The reversal of 30420805 is 50802403.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30420805 - 2⁵ = 30420773 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30420809) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 160015 + ... + 160204.

It is an arithmetic number, because the mean of its divisors is an integer number (4803300).

Almost surely, 2^30420805 is an apocalyptic number.

It is an amenable number.

30420805 is a deficient number, since it is larger than the sum of its proper divisors (8005595).

30420805 is a wasteful number, since it uses less digits than its factorization.

30420805 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 320243.

The product of its (nonzero) digits is 960, while the sum is 22.

The square root of 30420805 is about 5515.5058698183. The cubic root of 30420805 is about 312.1693312963.

The spelling of 30420805 in words is "thirty million, four hundred twenty thousand, eight hundred five".