394940 has 72 divisors (see below), whose sum is σ = 1072512. Its totient is φ = 120960.

The previous prime is 394931. The next prime is 394943. The reversal of 394940 is 49493.

394940 = 81² + 82² + ... + 119².

It is a happy number.

It is an Ulam number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394943) by changing a digit.

394940 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 12725 + ... + 12755.

It is an arithmetic number, because the mean of its divisors is an integer number (14896).

2³⁹⁴⁹⁴⁰ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 394940, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (536256).

394940 is an abundant number, since it is smaller than the sum of its proper divisors (677572).

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

394940 is a wasteful number, since it uses less digits than its factorization.

394940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67 (or 58 counting only the distinct ones).

The product of its (nonzero) digits is 3888, while the sum is 29.

The square root of 394940 is about 628.4425192490. The cubic root of 394940 is about 73.3686239692.

The spelling of 394940 in words is "three hundred ninety-four thousand, nine hundred forty".