30420665 has 8 divisors (see below), whose sum is σ = 39823488. Its totient is φ = 22124080.

The previous prime is 30420659. The next prime is 30420673. The reversal of 30420665 is 56602403.

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

It is not a de Polignac number, because 30420665 - 2²⁰ = 29372089 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 276497 + ... + 276606.

It is an arithmetic number, because the mean of its divisors is an integer number (4977936).

Almost surely, 2^30420665 is an apocalyptic number.

It is an amenable number.

30420665 is a deficient number, since it is larger than the sum of its proper divisors (9402823).

30420665 is a wasteful number, since it uses less digits than its factorization.

30420665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 553119.

The product of its (nonzero) digits is 4320, while the sum is 26.

The square root of 30420665 is about 5515.4931783114. The cubic root of 30420665 is about 312.1688524160.

The spelling of 30420665 in words is "thirty million, four hundred twenty thousand, six hundred sixty-five".