30811068 has 18 divisors (see below), whose sum is σ = 77883624. Its totient is φ = 10270344.

The previous prime is 30811061. The next prime is 30811133. The reversal of 30811068 is 86011803.

It is a tau number, because it is divible by the number of its divisors (18).

It is a super-2 number, since 2×30811068² = 1898643822601248, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30811061) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 427896 + ... + 427967.

It is an arithmetic number, because the mean of its divisors is an integer number (4326868).

Almost surely, 2^30811068 is an apocalyptic number.

It is an amenable number.

30811068 is an abundant number, since it is smaller than the sum of its proper divisors (47072556).

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

30811068 is a wasteful number, since it uses less digits than its factorization.

30811068 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 855873 (or 855868 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 30811068 is about 5550.7718382221. The cubic root of 30811068 is about 313.4985844277.

The spelling of 30811068 in words is "thirty million, eight hundred eleven thousand, sixty-eight".