394145980500 has 192 divisors, whose sum is σ = 1159759560960. Its totient is φ = 104011776000.

The previous prime is 394145980483. The next prime is 394145980531. The reversal of 394145980500 is 5089541493.

It is a self number, because there is not a number n which added to its sum of digits gives 394145980500.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 58921156 + ... + 58927844.

It is an arithmetic number, because the mean of its divisors is an integer number (6040414380).

Almost surely, 2^394145980500 is an apocalyptic number.

394145980500 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 394145980500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (579879780480).

394145980500 is an abundant number, since it is smaller than the sum of its proper divisors (765613580460).

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

394145980500 is a wasteful number, since it uses less digits than its factorization.

394145980500 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7115 (or 7103 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 48.

The spelling of 394145980500 in words is "three hundred ninety-four billion, one hundred forty-five million, nine hundred eighty thousand, five hundred".