394059219840 has 2304 divisors, whose sum is σ = 1761114700800. Its totient is φ = 83328860160.

The previous prime is 394059219821. The next prime is 394059219859. The reversal of 394059219840 is 48912950493.

394059219840 is a `hidden beast` number, since 3 + 9 + 4 + 0 + 592 + 1 + 9 + 8 + 40 = 666.

It is an interprime number because it is at equal distance from previous prime (394059219821) and next prime (394059219859).

It is a Harshad number since it is a multiple of its sum of digits (54).

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 287 ways as a sum of consecutive naturals, for example, 8384238697 + ... + 8384238743.

It is an arithmetic number, because the mean of its divisors is an integer number (764372700).

Almost surely, 2^394059219840 is an apocalyptic number.

394059219840 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 394059219840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (880557350400).

394059219840 is an abundant number, since it is smaller than the sum of its proper divisors (1367055480960).

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

394059219840 is a wasteful number, since it uses less digits than its factorization.

394059219840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 147 (or 110 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 394059219840 in words is "three hundred ninety-four billion, fifty-nine million, two hundred nineteen thousand, eight hundred forty".