30878656 has 28 divisors (see below), whose sum is σ = 62023752. Its totient is φ = 15250688.

The previous prime is 30878641. The next prime is 30878663. The reversal of 30878656 is 65687803.

It is a congruent 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 3 ways as a sum of consecutive naturals, for example, 2406 + ... + 8218.

It is an arithmetic number, because the mean of its divisors is an integer number (2215134).

Almost surely, 2^30878656 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 30878656, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31011876).

30878656 is an abundant number, since it is smaller than the sum of its proper divisors (31145096).

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

30878656 is an equidigital number, since it uses as much as digits as its factorization.

30878656 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5908 (or 5898 counting only the distinct ones).

The product of its (nonzero) digits is 241920, while the sum is 43.

The square root of 30878656 is about 5556.8566654180. The cubic root of 30878656 is about 313.7276500325.

The spelling of 30878656 in words is "thirty million, eight hundred seventy-eight thousand, six hundred fifty-six".