30678321 has 4 divisors (see below), whose sum is σ = 40904432. Its totient is φ = 20452212.

The previous prime is 30678299. The next prime is 30678341. The reversal of 30678321 is 12387603.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30678321 - 2¹⁵ = 30645553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30678341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5113051 + ... + 5113056.

It is an arithmetic number, because the mean of its divisors is an integer number (10226108).

Almost surely, 2^30678321 is an apocalyptic number.

It is an amenable number.

30678321 is a deficient number, since it is larger than the sum of its proper divisors (10226111).

30678321 is a wasteful number, since it uses less digits than its factorization.

30678321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10226110.

The product of its (nonzero) digits is 6048, while the sum is 30.

The square root of 30678321 is about 5538.8014046362. The cubic root of 30678321 is about 313.0477085018.

The spelling of 30678321 in words is "thirty million, six hundred seventy-eight thousand, three hundred twenty-one".