844865406 has 48 divisors (see below), whose sum is σ = 2282237568. Its totient is φ = 219445200.

The previous prime is 844865353. The next prime is 844865407. The reversal of 844865406 is 604568448.

It is a Smith number, since the sum of its digits (45) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844865407) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 303400 + ... + 306171.

It is an arithmetic number, because the mean of its divisors is an integer number (47546616).

Almost surely, 2^844865406 is an apocalyptic number.

844865406 is an abundant number, since it is smaller than the sum of its proper divisors (1437372162).

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

844865406 is a wasteful number, since it uses less digits than its factorization.

844865406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 609597 (or 609594 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The square root of 844865406 is about 29066.5685281218. The cubic root of 844865406 is about 945.3569962186.

The spelling of 844865406 in words is "eight hundred forty-four million, eight hundred sixty-five thousand, four hundred six".