30308868 has 18 divisors (see below), whose sum is σ = 76614174. Its totient is φ = 10102944.

The previous prime is 30308849. The next prime is 30308869. The reversal of 30308868 is 86880303.

It can be written as a sum of positive squares in only one way, i.e., 30272004 + 36864 = 5502^2 + 192^2 .

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

It is a Smith number, since the sum of its digits (36) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (36), and also a Moran number because the ratio is a prime number: 841913 = 30308868 / (3 + 0 + 3 + 0 + 8 + 8 + 6 + 8).

It is not an unprimeable number, because it can be changed into a prime (30308869) 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, 420921 + ... + 420992.

It is an arithmetic number, because the mean of its divisors is an integer number (4256343).

Almost surely, 2^30308868 is an apocalyptic number.

It is an amenable number.

30308868 is an abundant number, since it is smaller than the sum of its proper divisors (46305306).

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

30308868 is a wasteful number, since it uses less digits than its factorization.

30308868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 841923 (or 841918 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 36.

The square root of 30308868 is about 5505.3490352565. The cubic root of 30308868 is about 311.7859725432.

The spelling of 30308868 in words is "thirty million, three hundred eight thousand, eight hundred sixty-eight".