394881 has 4 divisors (see below), whose sum is σ = 526512. Its totient is φ = 263252.

The previous prime is 394879. The next prime is 394897. The reversal of 394881 is 188493.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 394881 - 2¹ = 394879 is a prime.

It is a super-2 number, since 2×394881² = 311862008322, which contains 22 as substring.

It is a D-number.

It is not an unprimeable number, because it can be changed into a prime (394811) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65811 + ... + 65816.

It is an arithmetic number, because the mean of its divisors is an integer number (131628).

2³⁹⁴⁸⁸¹ is an apocalyptic number.

It is an amenable number.

394881 is a deficient number, since it is larger than the sum of its proper divisors (131631).

394881 is a wasteful number, since it uses less digits than its factorization.

394881 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 131630.

The product of its digits is 6912, while the sum is 33.

The square root of 394881 is about 628.3955760506. The cubic root of 394881 is about 73.3649702797.

It can be divided in two parts, 394 and 881, that added together give a triangular number (1275 = T₅₀).

The spelling of 394881 in words is "three hundred ninety-four thousand, eight hundred eighty-one".