394313703840 has 288 divisors, whose sum is σ = 1604686277376. Its totient is φ = 86210150400.

The previous prime is 394313703757. The next prime is 394313703841. The reversal of 394313703840 is 48307313493.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (288).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is not an unprimeable number, because it can be changed into a prime (394313703841) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 618561 + ... + 1082240.

It is an arithmetic number, because the mean of its divisors is an integer number (5571827352).

Almost surely, 2^394313703840 is an apocalyptic number.

394313703840 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

394313703840 is an abundant number, since it is smaller than the sum of its proper divisors (1210372573536).

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

394313703840 is a wasteful number, since it uses less digits than its factorization.

394313703840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1700852 (or 1700841 counting only the distinct ones).

The product of its (nonzero) digits is 653184, while the sum is 45.

The spelling of 394313703840 in words is "three hundred ninety-four billion, three hundred thirteen million, seven hundred three thousand, eight hundred forty".