394444444457 has 16 divisors (see below), whose sum is σ = 463006494720. Its totient is φ = 328936759488.

The previous prime is 394444444453. The next prime is 394444444463. The reversal of 394444444457 is 754444444493.

It is a cyclic number.

It is not a de Polignac number, because 394444444457 - 2² = 394444444453 is a prime.

It is not an unprimeable number, because it can be changed into a prime (394444444453) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5141144 + ... + 5217302.

It is an arithmetic number, because the mean of its divisors is an integer number (28937905920).

Almost surely, 2^394444444457 is an apocalyptic number.

394444444457 is a gapful number since it is divisible by the number (37) formed by its first and last digit.

It is an amenable number.

394444444457 is a deficient number, since it is larger than the sum of its proper divisors (68562050263).

394444444457 is a wasteful number, since it uses less digits than its factorization.

394444444457 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96200.

The product of its digits is 61931520, while the sum is 56.

The spelling of 394444444457 in words is "three hundred ninety-four billion, four hundred forty-four million, four hundred forty-four thousand, four hundred fifty-seven".