394149873 has 16 divisors (see below), whose sum is σ = 590567040. Its totient is φ = 232007424.

The previous prime is 394149859. The next prime is 394149901. The reversal of 394149873 is 378941493.

It is a happy number.

It is not a de Polignac number, because 394149873 - 2⁴ = 394149857 is a prime.

It is a super-2 number, since 2×394149873² = 310708244771832258, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (394149803) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 218808 + ... + 220601.

It is an arithmetic number, because the mean of its divisors is an integer number (36910440).

Almost surely, 2^394149873 is an apocalyptic number.

It is an amenable number.

394149873 is a deficient number, since it is larger than the sum of its proper divisors (196417167).

394149873 is a wasteful number, since it uses less digits than its factorization.

394149873 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 439448.

The product of its digits is 653184, while the sum is 48.

The square root of 394149873 is about 19853.2081286627. The cubic root of 394149873 is about 733.1966359300.

The spelling of 394149873 in words is "three hundred ninety-four million, one hundred forty-nine thousand, eight hundred seventy-three".