844400683400 has 24 divisors (see below), whose sum is σ = 1963231589370. Its totient is φ = 337760273280.

The previous prime is 844400683387. The next prime is 844400683411. The reversal of 844400683400 is 4386004448.

It can be written as a sum of positive squares in 3 ways, for example, as 420414779236 + 423985904164 = 648394^2 + 651142^2 .

It is a Smith number, since the sum of its digits (41) coincides with the sum of the digits of its prime factors.

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, 2111001509 + ... + 2111001908.

Almost surely, 2^844400683400 is an apocalyptic number.

It is an amenable number.

844400683400 is an abundant number, since it is smaller than the sum of its proper divisors (1118830905970).

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

844400683400 is a wasteful number, since it uses less digits than its factorization.

844400683400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4222003433 (or 4222003424 counting only the distinct ones).

The product of its (nonzero) digits is 294912, while the sum is 41.

Adding to 844400683400 its reverse (4386004448), we get a palindrome (848786687848).

The spelling of 844400683400 in words is "eight hundred forty-four billion, four hundred million, six hundred eighty-three thousand, four hundred".