30771968 has 36 divisors (see below), whose sum is σ = 62325648. Its totient is φ = 15160320.

The previous prime is 30771943. The next prime is 30771997. The reversal of 30771968 is 86917703.

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, 17330 + ... + 19022.

It is an arithmetic number, because the mean of its divisors is an integer number (1731268).

Almost surely, 2^30771968 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 30771968, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31162824).

30771968 is an abundant number, since it is smaller than the sum of its proper divisors (31553680).

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

30771968 is an equidigital number, since it uses as much as digits as its factorization.

30771968 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1780 (or 1766 counting only the distinct ones).

The product of its (nonzero) digits is 63504, while the sum is 41.

The square root of 30771968 is about 5547.2486874125. The cubic root of 30771968 is about 313.3659158311.

The spelling of 30771968 in words is "thirty million, seven hundred seventy-one thousand, nine hundred sixty-eight".