394920812988 has 72 divisors (see below), whose sum is σ = 1075180670928. Its totient is φ = 121500707328.

The previous prime is 394920812911. The next prime is 394920812989. The reversal of 394920812988 is 889218029493.

It is a happy number.

394920812988 is a `hidden beast` number, since 394 + 92 + 0 + 81 + 2 + 9 + 88 = 666.

It is a super-2 number, since 2×394920812988² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394920812989) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4728931 + ... + 4811717.

It is an arithmetic number, because the mean of its divisors is an integer number (14933064874).

Almost surely, 2^394920812988 is an apocalyptic number.

It is an amenable number.

394920812988 is an abundant number, since it is smaller than the sum of its proper divisors (680259857940).

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

394920812988 is a wasteful number, since it uses less digits than its factorization.

394920812988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93003 (or 92998 counting only the distinct ones).

The product of its (nonzero) digits is 17915904, while the sum is 63.

The spelling of 394920812988 in words is "three hundred ninety-four billion, nine hundred twenty million, eight hundred twelve thousand, nine hundred eighty-eight".