30428043 has 4 divisors (see below), whose sum is σ = 40570728. Its totient is φ = 20285360.

The previous prime is 30428039. The next prime is 30428059. The reversal of 30428043 is 34082403.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 34082403 = 3 ⋅11360801.

It is a cyclic number.

It is not a de Polignac number, because 30428043 - 2² = 30428039 is a prime.

It is not an unprimeable number, because it can be changed into a prime (30428003) 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, 5071338 + ... + 5071343.

It is an arithmetic number, because the mean of its divisors is an integer number (10142682).

Almost surely, 2^30428043 is an apocalyptic number.

30428043 is a deficient number, since it is larger than the sum of its proper divisors (10142685).

30428043 is a wasteful number, since it uses less digits than its factorization.

30428043 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 10142684.

The product of its (nonzero) digits is 2304, while the sum is 24.

The square root of 30428043 is about 5516.1619809429. The cubic root of 30428043 is about 312.1940874070.

The spelling of 30428043 in words is "thirty million, four hundred twenty-eight thousand, forty-three".