394444872280 has 32 divisors (see below), whose sum is σ = 918104446800. Its totient is φ = 152337329536.

The previous prime is 394444872271. The next prime is 394444872287. The reversal of 394444872280 is 82278444493.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (394444872287) 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 7 ways as a sum of consecutive naturals, for example, 170018182 + ... + 170020501.

Almost surely, 2^394444872280 is an apocalyptic number.

It is an amenable number.

394444872280 is an abundant number, since it is smaller than the sum of its proper divisors (523659574520).

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

394444872280 is a wasteful number, since it uses less digits than its factorization.

394444872280 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 340038723 (or 340038719 counting only the distinct ones).

The product of its (nonzero) digits is 12386304, while the sum is 55.

The spelling of 394444872280 in words is "three hundred ninety-four billion, four hundred forty-four million, eight hundred seventy-two thousand, two hundred eighty".