394149887974 has 8 divisors (see below), whose sum is σ = 622341928440. Its totient is φ = 186702578496.

The previous prime is 394149887969. The next prime is 394149887977. The reversal of 394149887974 is 479788941493.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 394149887897 and 394149887906.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394149887977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5186182699 + ... + 5186182774.

It is an arithmetic number, because the mean of its divisors is an integer number (77792741055).

Almost surely, 2^394149887974 is an apocalyptic number.

394149887974 is a deficient number, since it is larger than the sum of its proper divisors (228192040466).

394149887974 is a wasteful number, since it uses less digits than its factorization.

394149887974 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10372365494.

The product of its digits is 438939648, while the sum is 73.

The spelling of 394149887974 in words is "three hundred ninety-four billion, one hundred forty-nine million, eight hundred eighty-seven thousand, nine hundred seventy-four".