394115145 has 16 divisors (see below), whose sum is σ = 632835072. Its totient is φ = 209444480.

The previous prime is 394115123. The next prime is 394115147. The reversal of 394115145 is 541511493.

It is not a de Polignac number, because 394115145 - 2²¹ = 392017993 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394115147) 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, 42537 + ... + 50966.

It is an arithmetic number, because the mean of its divisors is an integer number (39552192).

Almost surely, 2^394115145 is an apocalyptic number.

It is an amenable number.

394115145 is a deficient number, since it is larger than the sum of its proper divisors (238719927).

394115145 is a wasteful number, since it uses less digits than its factorization.

394115145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 93792.

The product of its digits is 10800, while the sum is 33.

The square root of 394115145 is about 19852.3334900459. Note that the first 3 decimals coincide. The cubic root of 394115145 is about 733.1751016504.

The spelling of 394115145 in words is "three hundred ninety-four million, one hundred fifteen thousand, one hundred forty-five".