30428238 has 8 divisors (see below), whose sum is σ = 60856488. Its totient is φ = 10142744.

The previous prime is 30428231. The next prime is 30428239. The reversal of 30428238 is 83282403.

It is a sphenic number, since it is the product of 3 distinct primes.

30428238 is an admirable number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30428231) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2535681 + ... + 2535692.

It is an arithmetic number, because the mean of its divisors is an integer number (7607061).

Almost surely, 2^30428238 is an apocalyptic number.

30428238 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

30428238 is a wasteful number, since it uses less digits than its factorization.

30428238 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5071378.

The product of its (nonzero) digits is 9216, while the sum is 30.

The square root of 30428238 is about 5516.1796562476. The cubic root of 30428238 is about 312.1947543106.

The spelling of 30428238 in words is "thirty million, four hundred twenty-eight thousand, two hundred thirty-eight".