394078285165320 has 512 divisors, whose sum is σ = 1589994377625600. Its totient is φ = 84753310003200.

The previous prime is 394078285165297. The next prime is 394078285165321. The reversal of 394078285165320 is 23561582870493.

394078285165320 is a `hidden beast` number, since 3 + 9 + 4 + 0 + 7 + 8 + 2 + 85 + 16 + 532 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (63).

It is not an unprimeable number, because it can be changed into a prime (394078285165321) by changing a digit.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 471379285 + ... + 472214555.

It is an arithmetic number, because the mean of its divisors is an integer number (3105457768800).

It is a 1-persistent number, because it is pandigital, but 2⋅394078285165320 = 788156570330640 is not.

Almost surely, 2^{394078285165320} is an apocalyptic number.

394078285165320 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 394078285165320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (794997188812800).

394078285165320 is an abundant number, since it is smaller than the sum of its proper divisors (1195916092460280).

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

394078285165320 is a wasteful number, since it uses less digits than its factorization.

394078285165320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 838986 (or 838976 counting only the distinct ones).

The product of its (nonzero) digits is 87091200, while the sum is 63.

The spelling of 394078285165320 in words is "three hundred ninety-four trillion, seventy-eight billion, two hundred eighty-five million, one hundred sixty-five thousand, three hundred twenty".