394629081 has 16 divisors (see below), whose sum is σ = 656007168. Its totient is φ = 205002000.

The previous prime is 394629073. The next prime is 394629091. The reversal of 394629081 is 180926493.

It is not a de Polignac number, because 394629081 - 2³ = 394629073 is a prime.

It is a super-2 number, since 2×394629081² = 311464223141809122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394629091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 853945 + ... + 854406.

It is an arithmetic number, because the mean of its divisors is an integer number (41000448).

Almost surely, 2^394629081 is an apocalyptic number.

It is an amenable number.

394629081 is a deficient number, since it is larger than the sum of its proper divisors (261378087).

394629081 is a wasteful number, since it uses less digits than its factorization.

394629081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1708372.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 394629081 is about 19865.2732425205. The cubic root of 394629081 is about 733.4936561090.

The spelling of 394629081 in words is "three hundred ninety-four million, six hundred twenty-nine thousand, eighty-one".