42930389 has 8 divisors (see below), whose sum is σ = 45577368. Its totient is φ = 40296960.

The previous prime is 42930379. The next prime is 42930409. The reversal of 42930389 is 98303924.

It can be written as a sum of positive squares in 4 ways, for example, as 9672100 + 33258289 = 3110^2 + 5767^2 .

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 42930389 - 2⁴ = 42930373 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (42930379) 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, 3569 + ... + 9929.

It is an arithmetic number, because the mean of its divisors is an integer number (5697171).

Almost surely, 2^42930389 is an apocalyptic number.

It is an amenable number.

42930389 is a deficient number, since it is larger than the sum of its proper divisors (2646979).

42930389 is a wasteful number, since it uses less digits than its factorization.

42930389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6775.

The product of its (nonzero) digits is 46656, while the sum is 38.

The square root of 42930389 is about 6552.1285854293. The cubic root of 42930389 is about 350.1506535110.

The spelling of 42930389 in words is "forty-two million, nine hundred thirty thousand, three hundred eighty-nine".