30394428 has 12 divisors (see below), whose sum is σ = 70920360. Its totient is φ = 10131472.

The previous prime is 30394423. The next prime is 30394439. The reversal of 30394428 is 82449303.

It is a tau number, because it is divible by the number of its divisors (12).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30394423) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1266423 + ... + 1266446.

It is an arithmetic number, because the mean of its divisors is an integer number (5910030).

Almost surely, 2^30394428 is an apocalyptic number.

It is an amenable number.

30394428 is an abundant number, since it is smaller than the sum of its proper divisors (40525932).

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

30394428 is a wasteful number, since it uses less digits than its factorization.

30394428 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2532876 (or 2532874 counting only the distinct ones).

The product of its (nonzero) digits is 20736, while the sum is 33.

The square root of 30394428 is about 5513.1141834720. The cubic root of 30394428 is about 312.0790808746.

The spelling of 30394428 in words is "thirty million, three hundred ninety-four thousand, four hundred twenty-eight".