394097881 has 8 divisors (see below), whose sum is σ = 409876544. Its totient is φ = 378619920.

The previous prime is 394097857. The next prime is 394097897. The reversal of 394097881 is 188790493.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 394097881 - 2¹¹ = 394095833 is a prime.

It is a super-2 number, since 2×394097881² = 310626279617380322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394097381) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72501 + ... + 77746.

It is an arithmetic number, because the mean of its divisors is an integer number (51234568).

Almost surely, 2^394097881 is an apocalyptic number.

It is an amenable number.

394097881 is a deficient number, since it is larger than the sum of its proper divisors (15778663).

394097881 is a wasteful number, since it uses less digits than its factorization.

394097881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 150351.

The product of its (nonzero) digits is 435456, while the sum is 49.

The square root of 394097881 is about 19851.8986749379. The cubic root of 394097881 is about 733.1643960483.

The spelling of 394097881 in words is "three hundred ninety-four million, ninety-seven thousand, eight hundred eighty-one".