30655968 has 144 divisors (see below), whose sum is σ = 98824320. Its totient is φ = 8297856.

The previous prime is 30655939. The next prime is 30655969. The reversal of 30655968 is 86955603.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a nialpdrome in base 14.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30655969) by changing a digit.

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, 1613463 + ... + 1613481.

It is an arithmetic number, because the mean of its divisors is an integer number (686280).

Almost surely, 2^30655968 is an apocalyptic number.

30655968 is a gapful number since it is divisible by the number (38) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30655968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (49412160).

30655968 is an abundant number, since it is smaller than the sum of its proper divisors (68168352).

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

30655968 is an frugal number, since it uses more digits than its factorization.

30655968 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 31 counting only the distinct ones).

The product of its (nonzero) digits is 194400, while the sum is 42.

The square root of 30655968 is about 5536.7831815956. The cubic root of 30655968 is about 312.9716585375.

The spelling of 30655968 in words is "thirty million, six hundred fifty-five thousand, nine hundred sixty-eight".