394281481 has 8 divisors (see below), whose sum is σ = 434959200. Its totient is φ = 354409440.

The previous prime is 394281473. The next prime is 394281487. The reversal of 394281481 is 184182493.

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

It is not a de Polignac number, because 394281481 - 2³ = 394281473 is a prime.

It is a super-2 number, since 2×394281481² = 310915772519106722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394281487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 200391 + ... + 202348.

It is an arithmetic number, because the mean of its divisors is an integer number (54369900).

Almost surely, 2^394281481 is an apocalyptic number.

It is an amenable number.

394281481 is a deficient number, since it is larger than the sum of its proper divisors (40677719).

394281481 is a wasteful number, since it uses less digits than its factorization.

394281481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 402839.

The product of its digits is 55296, while the sum is 40.

The square root of 394281481 is about 19856.5223793090. The cubic root of 394281481 is about 733.2782324761.

The spelling of 394281481 in words is "three hundred ninety-four million, two hundred eighty-one thousand, four hundred eighty-one".