30420309 has 8 divisors (see below), whose sum is σ = 40829632. Its totient is φ = 20145600.

The previous prime is 30420277. The next prime is 30420317. The reversal of 30420309 is 90302403.

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

It is not a de Polignac number, because 30420309 - 2⁵ = 30420277 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 (30420359) 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, 33124 + ... + 34029.

It is an arithmetic number, because the mean of its divisors is an integer number (5103704).

Almost surely, 2^30420309 is an apocalyptic number.

It is an amenable number.

30420309 is a deficient number, since it is larger than the sum of its proper divisors (10409323).

30420309 is a wasteful number, since it uses less digits than its factorization.

30420309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 67307.

The product of its (nonzero) digits is 648, while the sum is 21.

The square root of 30420309 is about 5515.4609054910. The cubic root of 30420309 is about 312.1676346852.

The spelling of 30420309 in words is "thirty million, four hundred twenty thousand, three hundred nine".