30420605 has 8 divisors (see below), whose sum is σ = 38092032. Its totient is φ = 23278288.

The previous prime is 30420587. The next prime is 30420619. The reversal of 30420605 is 50602403.

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 30420605 - 2¹² = 30416509 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132149 + ... + 132378.

It is an arithmetic number, because the mean of its divisors is an integer number (4761504).

Almost surely, 2^30420605 is an apocalyptic number.

It is an amenable number.

30420605 is a deficient number, since it is larger than the sum of its proper divisors (7671427).

30420605 is a wasteful number, since it uses less digits than its factorization.

30420605 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 264555.

The product of its (nonzero) digits is 720, while the sum is 20.

The square root of 30420605 is about 5515.4877390853. The cubic root of 30420605 is about 312.1686471812.

It can be divided in two parts, 30420 and 605, that multiplied together give a square (18404100 = 4290²).

The spelling of 30420605 in words is "thirty million, four hundred twenty thousand, six hundred five".