394657245672 has 64 divisors (see below), whose sum is σ = 991443024000. Its totient is φ = 130913981184.

The previous prime is 394657245643. The next prime is 394657245673. The reversal of 394657245672 is 276542756493.

It is a super-2 number, since 2×394657245672² (a number of 24 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (394657245673) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4050358 + ... + 4146650.

It is an arithmetic number, because the mean of its divisors is an integer number (15491297250).

Almost surely, 2^394657245672 is an apocalyptic number.

It is an amenable number.

394657245672 is an abundant number, since it is smaller than the sum of its proper divisors (596785778328).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

394657245672 is a wasteful number, since it uses less digits than its factorization.

394657245672 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 97130 (or 97126 counting only the distinct ones).

The product of its digits is 76204800, while the sum is 60.

The spelling of 394657245672 in words is "three hundred ninety-four billion, six hundred fifty-seven million, two hundred forty-five thousand, six hundred seventy-two".