394247930 has 8 divisors (see below), whose sum is σ = 709646292. Its totient is φ = 157699168.

The previous prime is 394247927. The next prime is 394247933. The reversal of 394247930 is 39742493.

It is an interprime number because it is at equal distance from previous prime (394247927) and next prime (394247933).

It can be written as a sum of positive squares in 2 ways, for example, as 390418081 + 3829849 = 19759^2 + 1957^2 .

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

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394247933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19712387 + ... + 19712406.

Almost surely, 2^394247930 is an apocalyptic number.

394247930 is a deficient number, since it is larger than the sum of its proper divisors (315398362).

394247930 is a wasteful number, since it uses less digits than its factorization.

394247930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39424800.

The product of its (nonzero) digits is 163296, while the sum is 41.

The square root of 394247930 is about 19855.6775255845. The cubic root of 394247930 is about 733.2574326863.

The spelling of 394247930 in words is "three hundred ninety-four million, two hundred forty-seven thousand, nine hundred thirty".