30428539 has 2 divisors, whose sum is σ = 30428540. Its totient is φ = 30428538.

The previous prime is 30428537. The next prime is 30428579. The reversal of 30428539 is 93582403.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (93582403) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30428539 - 2¹ = 30428537 is a prime.

Together with 30428537, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (30428533) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15214269 + 15214270.

It is an arithmetic number, because the mean of its divisors is an integer number (15214270).

Almost surely, 2^30428539 is an apocalyptic number.

30428539 is a deficient number, since it is larger than the sum of its proper divisors (1).

30428539 is an equidigital number, since it uses as much as digits as its factorization.

30428539 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25920, while the sum is 34.

The square root of 30428539 is about 5516.2069395555. The cubic root of 30428539 is about 312.1957837306.

The spelling of 30428539 in words is "thirty million, four hundred twenty-eight thousand, five hundred thirty-nine".