30533868 has 48 divisors (see below), whose sum is σ = 81900000. Its totient is φ = 9825984.

The previous prime is 30533863. The next prime is 30533891. The reversal of 30533868 is 86833503.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (30533863) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1743 + ... + 8006.

It is an arithmetic number, because the mean of its divisors is an integer number (1706250).

Almost surely, 2^30533868 is an apocalyptic number.

It is an amenable number.

30533868 is an abundant number, since it is smaller than the sum of its proper divisors (51366132).

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

30533868 is a wasteful number, since it uses less digits than its factorization.

30533868 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9791 (or 9783 counting only the distinct ones).

The product of its (nonzero) digits is 51840, while the sum is 36.

The square root of 30533868 is about 5525.7459224977. The cubic root of 30533868 is about 312.5555928829. Note that the first 4 decimals are identical.

The spelling of 30533868 in words is "thirty million, five hundred thirty-three thousand, eight hundred sixty-eight".