393247930 has 8 divisors (see below), whose sum is σ = 707846292. Its totient is φ = 157299168.

The previous prime is 393247889. The next prime is 393247957. The reversal of 393247930 is 39742393.

It can be written as a sum of positive squares in 2 ways, for example, as 380367009 + 12880921 = 19503^2 + 3589^2 .

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19662387 + ... + 19662406.

Almost surely, 2^393247930 is an apocalyptic number.

393247930 is a deficient number, since it is larger than the sum of its proper divisors (314598362).

393247930 is a wasteful number, since it uses less digits than its factorization.

393247930 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 39324800.

The product of its (nonzero) digits is 122472, while the sum is 40.

The square root of 393247930 is about 19830.4798227375. The cubic root of 393247930 is about 732.6369447353.

The spelling of 393247930 in words is "three hundred ninety-three million, two hundred forty-seven thousand, nine hundred thirty".