394081929 has 20 divisors (see below), whose sum is σ = 593200080. Its totient is φ = 260708760.

The previous prime is 394081927. The next prime is 394081969. The reversal of 394081929 is 929180493.

It is not a de Polignac number, because 394081929 - 2¹ = 394081927 is a prime.

It is a super-2 number, since 2×394081929² = 310601133528722082, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394081927) 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 19 ways as a sum of consecutive naturals, for example, 7959 + ... + 29180.

It is an arithmetic number, because the mean of its divisors is an integer number (29660004).

Almost surely, 2^394081929 is an apocalyptic number.

It is an amenable number.

394081929 is a deficient number, since it is larger than the sum of its proper divisors (199118151).

394081929 is a wasteful number, since it uses less digits than its factorization.

394081929 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37282 (or 37273 counting only the distinct ones).

The product of its (nonzero) digits is 139968, while the sum is 45.

The square root of 394081929 is about 19851.4968957003. The cubic root of 394081929 is about 733.1545037544.

The spelling of 394081929 in words is "three hundred ninety-four million, eighty-one thousand, nine hundred twenty-nine".