30338920 has 32 divisors (see below), whose sum is σ = 68728320. Its totient is φ = 12052800.

The previous prime is 30338911. The next prime is 30338929. The reversal of 30338920 is 2983303.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (30338911) and next prime (30338929).

It is a Smith number, since the sum of its digits (28) coincides with the sum of the digits of its prime factors.

It is not an unprimeable number, because it can be changed into a prime (30338929) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3529 + ... + 8551.

It is an arithmetic number, because the mean of its divisors is an integer number (2147760).

Almost surely, 2^30338920 is an apocalyptic number.

It is an amenable number.

30338920 is an abundant number, since it is smaller than the sum of its proper divisors (38389400).

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

30338920 is a wasteful number, since it uses less digits than its factorization.

30338920 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5185 (or 5181 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 28.

The square root of 30338920 is about 5508.0777046080. The cubic root of 30338920 is about 311.8889863648. Note that the first 3 decimals are identical.

The spelling of 30338920 in words is "thirty million, three hundred thirty-eight thousand, nine hundred twenty".