394012080 has 640 divisors, whose sum is σ = 1782743040. Its totient is φ = 77552640.

The previous prime is 394012079. The next prime is 394012117. The reversal of 394012080 is 80210493.

It is a Harshad number since it is a multiple of its sum of digits (27).

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, 3825309 + ... + 3825411.

It is an arithmetic number, because the mean of its divisors is an integer number (2785536).

Almost surely, 2^394012080 is an apocalyptic number.

394012080 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 394012080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (891371520).

394012080 is an abundant number, since it is smaller than the sum of its proper divisors (1388730960).

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

394012080 is a wasteful number, since it uses less digits than its factorization.

394012080 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166 (or 154 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 27.

The square root of 394012080 is about 19849.7375297509. The cubic root of 394012080 is about 733.1111852369. Note that the first 4 decimals are identical.

The spelling of 394012080 in words is "three hundred ninety-four million, twelve thousand, eighty".