30320057 has 8 divisors (see below), whose sum is σ = 31282056. Its totient is φ = 29365632.

The previous prime is 30320023. The next prime is 30320071. The reversal of 30320057 is 75002303.

It can be written as a sum of positive squares in 4 ways, for example, as 14167696 + 16152361 = 3764^2 + 4019^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 30320057 - 2¹⁸ = 30057913 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30320557) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6863 + ... + 10379.

It is an arithmetic number, because the mean of its divisors is an integer number (3910257).

Almost surely, 2^30320057 is an apocalyptic number.

30320057 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

30320057 is a deficient number, since it is larger than the sum of its proper divisors (961999).

30320057 is a wasteful number, since it uses less digits than its factorization.

30320057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3787.

The product of its (nonzero) digits is 630, while the sum is 20.

The square root of 30320057 is about 5506.3651350051. The cubic root of 30320057 is about 311.8243347375.

The spelling of 30320057 in words is "thirty million, three hundred twenty thousand, fifty-seven".