394874932573440 has 1152 divisors, whose sum is σ = 1617576280104960. Its totient is φ = 90275409100800.

The previous prime is 394874932573333. The next prime is 394874932573481. The reversal of 394874932573440 is 44375239478493.

394874932573440 is a `hidden beast` number, since 3 + 9 + 4 + 8 + 7 + 4 + 9 + 3 + 2 + 573 + 4 + 40 = 666.

It is a tau number, because it is divible by the number of its divisors (1152).

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 620483244 + ... + 621119316.

It is an arithmetic number, because the mean of its divisors is an integer number (1404146076480).

Almost surely, 2^{394874932573440} is an apocalyptic number.

394874932573440 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 394874932573440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (808788140052480).

394874932573440 is an abundant number, since it is smaller than the sum of its proper divisors (1222701347531520).

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

394874932573440 is a wasteful number, since it uses less digits than its factorization.

394874932573440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 636208 (or 636188 counting only the distinct ones).

The product of its (nonzero) digits is 2194698240, while the sum is 72.

The spelling of 394874932573440 in words is "three hundred ninety-four trillion, eight hundred seventy-four billion, nine hundred thirty-two million, five hundred seventy-three thousand, four hundred forty".