394684842 has 16 divisors (see below), whose sum is σ = 790270272. Its totient is φ = 131411520.

The previous prime is 394684841. The next prime is 394684877. The reversal of 394684842 is 248486493.

It is a super-2 number, since 2×394684842² = 311552249009129928, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 394684791 and 394684800.

It is not an unprimeable number, because it can be changed into a prime (394684841) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31759 + ... + 42402.

It is an arithmetic number, because the mean of its divisors is an integer number (49391892).

Almost surely, 2^394684842 is an apocalyptic number.

394684842 is an abundant number, since it is smaller than the sum of its proper divisors (395585430).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394684842 is a wasteful number, since it uses less digits than its factorization.

394684842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75053.

The product of its digits is 1327104, while the sum is 48.

The square root of 394684842 is about 19866.6766722570. The cubic root of 394684842 is about 733.5282019779.

It can be divided in two parts, 3946 and 84842, that added together give a palindrome (88788).

The spelling of 394684842 in words is "three hundred ninety-four million, six hundred eighty-four thousand, eight hundred forty-two".