30428357 has 4 divisors (see below), whose sum is σ = 30464640. Its totient is φ = 30392076.

The previous prime is 30428347. The next prime is 30428369. The reversal of 30428357 is 75382403.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 75382403 = 17 ⋅4434259.

It is a cyclic number.

It is not a de Polignac number, because 30428357 - 2¹⁴ = 30411973 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30428347) 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, 16853 + ... + 18570.

It is an arithmetic number, because the mean of its divisors is an integer number (7616160).

Almost surely, 2^30428357 is an apocalyptic number.

It is an amenable number.

30428357 is a deficient number, since it is larger than the sum of its proper divisors (36283).

30428357 is an equidigital number, since it uses as much as digits as its factorization.

30428357 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36282.

The product of its (nonzero) digits is 20160, while the sum is 32.

The square root of 30428357 is about 5516.1904426878. The cubic root of 30428357 is about 312.1951612914.

The spelling of 30428357 in words is "thirty million, four hundred twenty-eight thousand, three hundred fifty-seven".