394736481219 has 16 divisors (see below), whose sum is σ = 526895943680. Its totient is φ = 262867429440.

The previous prime is 394736481199. The next prime is 394736481247. The reversal of 394736481219 is 912184637493.

It is a happy number.

It is not a de Polignac number, because 394736481219 - 2¹⁶ = 394736415683 is a prime.

It is a super-2 number, since 2×394736481219² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (394736481019) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 31850514 + ... + 31862904.

It is an arithmetic number, because the mean of its divisors is an integer number (32930996480).

Almost surely, 2^394736481219 is an apocalyptic number.

394736481219 is a deficient number, since it is larger than the sum of its proper divisors (132159462461).

394736481219 is a wasteful number, since it uses less digits than its factorization.

394736481219 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 23250.

The product of its digits is 7838208, while the sum is 57.

The spelling of 394736481219 in words is "three hundred ninety-four billion, seven hundred thirty-six million, four hundred eighty-one thousand, two hundred nineteen".