390246305 has 8 divisors (see below), whose sum is σ = 495842472. Its totient is φ = 293832448.

The previous prime is 390246299. The next prime is 390246319. The reversal of 390246305 is 503642093.

It can be written as a sum of positive squares in 4 ways, for example, as 34093921 + 356152384 = 5839^2 + 18872^2 .

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 390246305 - 2¹⁴ = 390229921 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2295482 + ... + 2295651.

It is an arithmetic number, because the mean of its divisors is an integer number (61980309).

Almost surely, 2^390246305 is an apocalyptic number.

It is an amenable number.

390246305 is a deficient number, since it is larger than the sum of its proper divisors (105596167).

390246305 is a wasteful number, since it uses less digits than its factorization.

390246305 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4591155.

The product of its (nonzero) digits is 19440, while the sum is 32.

The square root of 390246305 is about 19754.6527430881. The cubic root of 390246305 is about 730.7681318500.

Adding to 390246305 its reverse (503642093), we get a palindrome (893888398).

The spelling of 390246305 in words is "three hundred ninety million, two hundred forty-six thousand, three hundred five".