393935842 has 8 divisors (see below), whose sum is σ = 591006636. Its totient is φ = 196933632.

The previous prime is 393935819. The next prime is 393935851. The reversal of 393935842 is 248539393.

It can be written as a sum of positive squares in 2 ways, for example, as 343397961 + 50537881 = 18531^2 + 7109^2 .

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

It is a super-2 number, since 2×393935842² = 310370895224497928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 393935792 and 393935801.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1098 + ... + 28090.

Almost surely, 2^393935842 is an apocalyptic number.

393935842 is a deficient number, since it is larger than the sum of its proper divisors (197070794).

393935842 is a wasteful number, since it uses less digits than its factorization.

393935842 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 34292.

The product of its digits is 699840, while the sum is 46.

The square root of 393935842 is about 19847.8170588103. The cubic root of 393935842 is about 733.0638985854.

The spelling of 393935842 in words is "three hundred ninety-three million, nine hundred thirty-five thousand, eight hundred forty-two".