394985658 has 16 divisors (see below), whose sum is σ = 790168896. Its totient is φ = 131628960.

The previous prime is 394985653. The next prime is 394985681. The reversal of 394985658 is 856589493.

It is a junction number, because it is equal to n+sod(n) for n = 394985598 and 394985607.

It is not an unprimeable number, because it can be changed into a prime (394985651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36235 + ... + 45857.

It is an arithmetic number, because the mean of its divisors is an integer number (49385556).

Almost surely, 2^394985658 is an apocalyptic number.

394985658 is an abundant number, since it is smaller than the sum of its proper divisors (395183238).

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

394985658 is a wasteful number, since it uses less digits than its factorization.

394985658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16469.

The product of its digits is 9331200, while the sum is 57.

The square root of 394985658 is about 19874.2460989090. The cubic root of 394985658 is about 733.7145117966.

The spelling of 394985658 in words is "three hundred ninety-four million, nine hundred eighty-five thousand, six hundred fifty-eight".