394709785800 has 192 divisors, whose sum is σ = 1345029269760. Its totient is φ = 94956576000.

The previous prime is 394709785751. The next prime is 394709785823. The reversal of 394709785800 is 8587907493.

It is a Harshad number since it is a multiple of its sum of digits (60).

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 636339 + ... + 1092861.

It is an arithmetic number, because the mean of its divisors is an integer number (7005360780).

Almost surely, 2^394709785800 is an apocalyptic number.

394709785800 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394709785800, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (672514634880).

394709785800 is an abundant number, since it is smaller than the sum of its proper divisors (950319483960).

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

394709785800 is a wasteful number, since it uses less digits than its factorization.

394709785800 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 456684 (or 456675 counting only the distinct ones).

The product of its (nonzero) digits is 15240960, while the sum is 60.

The spelling of 394709785800 in words is "three hundred ninety-four billion, seven hundred nine million, seven hundred eighty-five thousand, eight hundred".