30328421 has 8 divisors (see below), whose sum is σ = 32121024. Its totient is φ = 28575360.

The previous prime is 30328393. The next prime is 30328429. The reversal of 30328421 is 12482303.

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 30328421 - 2¹⁸ = 30066277 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (23).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30328429) 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, 8300 + ... + 11381.

It is an arithmetic number, because the mean of its divisors is an integer number (4015128).

Almost surely, 2^30328421 is an apocalyptic number.

It is an amenable number.

30328421 is a deficient number, since it is larger than the sum of its proper divisors (1792603).

30328421 is a wasteful number, since it uses less digits than its factorization.

30328421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19771.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 30328421 is about 5507.1245673219. The cubic root of 30328421 is about 311.8530050767.

The spelling of 30328421 in words is "thirty million, three hundred twenty-eight thousand, four hundred twenty-one".