30678945 has 24 divisors (see below), whose sum is σ = 53957568. Its totient is φ = 14873760.

The previous prime is 30678937. The next prime is 30678953. The reversal of 30678945 is 54987603.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30678937) and next prime (30678953).

It is not a de Polignac number, because 30678945 - 2³ = 30678937 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 30678897 and 30678906.

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 23 ways as a sum of consecutive naturals, for example, 6637 + ... + 10266.

It is an arithmetic number, because the mean of its divisors is an integer number (2248232).

Almost surely, 2^30678945 is an apocalyptic number.

It is an amenable number.

30678945 is a deficient number, since it is larger than the sum of its proper divisors (23278623).

30678945 is a wasteful number, since it uses less digits than its factorization.

30678945 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16933 (or 16922 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 42.

The square root of 30678945 is about 5538.8577342264. The cubic root of 30678945 is about 313.0498309609.

The spelling of 30678945 in words is "thirty million, six hundred seventy-eight thousand, nine hundred forty-five".