394921957852 has 24 divisors (see below), whose sum is σ = 697612608000. Its totient is φ = 195604894656.

The previous prime is 394921957823. The next prime is 394921957853. The reversal of 394921957852 is 258759129493.

It is a happy number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394921957853) 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, 1858149 + ... + 2059747.

It is an arithmetic number, because the mean of its divisors is an integer number (29067192000).

Almost surely, 2^394921957852 is an apocalyptic number.

It is an amenable number.

394921957852 is a deficient number, since it is larger than the sum of its proper divisors (302690650148).

394921957852 is a wasteful number, since it uses less digits than its factorization.

394921957852 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206205 (or 206203 counting only the distinct ones).

The product of its digits is 48988800, while the sum is 64.

The spelling of 394921957852 in words is "three hundred ninety-four billion, nine hundred twenty-one million, nine hundred fifty-seven thousand, eight hundred fifty-two".