394783073620 has 24 divisors (see below), whose sum is σ = 892817105544. Its totient is φ = 145766057856.

The previous prime is 394783073579. The next prime is 394783073639. The reversal of 394783073620 is 26370387493.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 4585456656 + 390197616964 = 67716^2 + 624658^2 .

It is a Harshad number since it is a multiple of its sum of digits (52).

It is a congruent number.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 759197959 + ... + 759198478.

It is an arithmetic number, because the mean of its divisors is an integer number (37200712731).

Almost surely, 2^394783073620 is an apocalyptic number.

It is an amenable number.

394783073620 is an abundant number, since it is smaller than the sum of its proper divisors (498034031924).

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

394783073620 is a wasteful number, since it uses less digits than its factorization.

394783073620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1518396459 (or 1518396457 counting only the distinct ones).

The product of its (nonzero) digits is 4572288, while the sum is 52.

The spelling of 394783073620 in words is "three hundred ninety-four billion, seven hundred eighty-three million, seventy-three thousand, six hundred twenty".