394083840 has 240 divisors, whose sum is σ = 1330571088. Its totient is φ = 99483648.

The previous prime is 394083829. The next prime is 394083853. The reversal of 394083840 is 48380493.

It is a tau number, because it is divible by the number of its divisors (240).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4062672 + ... + 4062768.

Almost surely, 2^394083840 is an apocalyptic number.

394083840 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 394083840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (665285544).

394083840 is an abundant number, since it is smaller than the sum of its proper divisors (936487248).

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

394083840 is an equidigital number, since it uses as much as digits as its factorization.

394083840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 169 (or 130 counting only the distinct ones).

The product of its (nonzero) digits is 82944, while the sum is 39.

The square root of 394083840 is about 19851.5450280325. The cubic root of 394083840 is about 733.1556888345.

The spelling of 394083840 in words is "three hundred ninety-four million, eighty-three thousand, eight hundred forty".