844723485 has 20 divisors (see below), whose sum is σ = 1514245788. Its totient is φ = 450518976.

The previous prime is 844723483. The next prime is 844723493. The reversal of 844723485 is 584327448.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 267715044 + 577008441 = 16362^2 + 24021^2 .

It is not a de Polignac number, because 844723485 - 2¹ = 844723483 is a prime.

It is a super-2 number, since 2×844723485² = 1427115532221090450, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 844723485.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (844723483) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1042464 + ... + 1043273.

Almost surely, 2^844723485 is an apocalyptic number.

It is an amenable number.

844723485 is a deficient number, since it is larger than the sum of its proper divisors (669522303).

844723485 is a wasteful number, since it uses less digits than its factorization.

844723485 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2085754 (or 2085745 counting only the distinct ones).

The product of its digits is 860160, while the sum is 45.

The square root of 844723485 is about 29064.1271157418. The cubic root of 844723485 is about 945.3040593750.

The spelling of 844723485 in words is "eight hundred forty-four million, seven hundred twenty-three thousand, four hundred eighty-five".