394248815 has 8 divisors (see below), whose sum is σ = 475130448. Its totient is φ = 314044480.

The previous prime is 394248781. The next prime is 394248839. The reversal of 394248815 is 518842493.

It is a happy number.

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

It is not a de Polignac number, because 394248815 - 2⁸ = 394248559 is a prime.

It is a Duffinian number.

It is a congruent 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, 168041 + ... + 170370.

It is an arithmetic number, because the mean of its divisors is an integer number (59391306).

Almost surely, 2^394248815 is an apocalyptic number.

394248815 is a deficient number, since it is larger than the sum of its proper divisors (80881633).

394248815 is a wasteful number, since it uses less digits than its factorization.

394248815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 338649.

The product of its digits is 276480, while the sum is 44.

The square root of 394248815 is about 19855.6998113892. The cubic root of 394248815 is about 733.2579813531.

The spelling of 394248815 in words is "three hundred ninety-four million, two hundred forty-eight thousand, eight hundred fifteen".