30173428 has 12 divisors (see below), whose sum is σ = 53189892. Its totient is φ = 14976320.

The previous prime is 30173413. The next prime is 30173431. The reversal of 30173428 is 82437103.

It can be written as a sum of positive squares in 2 ways, for example, as 15824484 + 14348944 = 3978^2 + 3788^2 .

It is a junction number, because it is equal to n+sod(n) for n = 30173396 and 30173405.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 26983 + ... + 28078.

It is an arithmetic number, because the mean of its divisors is an integer number (4432491).

Almost surely, 2^30173428 is an apocalyptic number.

It is an amenable number.

30173428 is a deficient number, since it is larger than the sum of its proper divisors (23016464).

30173428 is a wasteful number, since it uses less digits than its factorization.

30173428 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55202 (or 55200 counting only the distinct ones).

The product of its (nonzero) digits is 4032, while the sum is 28.

The square root of 30173428 is about 5493.0344983442. The cubic root of 30173428 is about 311.3208572946.

The spelling of 30173428 in words is "thirty million, one hundred seventy-three thousand, four hundred twenty-eight".