394448243975 has 6 divisors (see below), whose sum is σ = 489115822560. Its totient is φ = 315558595160.

The previous prime is 394448243921. The next prime is 394448243983. The reversal of 394448243975 is 579342844493.

It is a happy number.

It is not a de Polignac number, because 394448243975 - 2⁶ = 394448243911 is a prime.

It is a super-2 number, since 2×394448243975² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7888964855 + ... + 7888964904.

It is an arithmetic number, because the mean of its divisors is an integer number (81519303760).

Almost surely, 2^394448243975 is an apocalyptic number.

394448243975 is a deficient number, since it is larger than the sum of its proper divisors (94667578585).

394448243975 is a wasteful number, since it uses less digits than its factorization.

394448243975 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15777929769 (or 15777929764 counting only the distinct ones).

The product of its digits is 104509440, while the sum is 62.

The spelling of 394448243975 in words is "three hundred ninety-four billion, four hundred forty-eight million, two hundred forty-three thousand, nine hundred seventy-five".