30428849 has 4 divisors (see below), whose sum is σ = 33195120. Its totient is φ = 27662580.

The previous prime is 30428843. The next prime is 30428857. The reversal of 30428849 is 94882403.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 30428849 - 2¹² = 30424753 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30428843) 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, 1383119 + ... + 1383140.

It is an arithmetic number, because the mean of its divisors is an integer number (8298780).

Almost surely, 2^30428849 is an apocalyptic number.

It is an amenable number.

30428849 is a deficient number, since it is larger than the sum of its proper divisors (2766271).

30428849 is a wasteful number, since it uses less digits than its factorization.

30428849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2766270.

The product of its (nonzero) digits is 55296, while the sum is 38.

The square root of 30428849 is about 5516.2350385023. The cubic root of 30428849 is about 312.1968439236.

The spelling of 30428849 in words is "thirty million, four hundred twenty-eight thousand, eight hundred forty-nine".