30678656 has 32 divisors (see below), whose sum is σ = 61827300. Its totient is φ = 15161344.

The previous prime is 30678629. The next prime is 30678667. The reversal of 30678656 is 65687603.

It can be written as a sum of positive squares in 2 ways, for example, as 29333056 + 1345600 = 5416^2 + 1160^2 .

It is a tau number, because it is divible by the number of its divisors (32).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10046 + ... + 12738.

Almost surely, 2^30678656 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30678656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (30913650).

30678656 is an abundant number, since it is smaller than the sum of its proper divisors (31148644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30678656 is an equidigital number, since it uses as much as digits as its factorization.

30678656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2796 (or 2784 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 41.

The square root of 30678656 is about 5538.8316457535. The cubic root of 30678656 is about 313.0488479666.

The spelling of 30678656 in words is "thirty million, six hundred seventy-eight thousand, six hundred fifty-six".