844488040 has 48 divisors (see below), whose sum is σ = 2088549540. Its totient is φ = 307084800.

The previous prime is 844488031. The next prime is 844488049. The reversal of 844488040 is 40884448.

It is an interprime number because it is at equal distance from previous prime (844488031) and next prime (844488049).

It can be written as a sum of positive squares in 2 ways, for example, as 829324804 + 15163236 = 28798^2 + 3894^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors.

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 844487984 and 844488002.

It is not an unprimeable number, because it can be changed into a prime (844488049) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 82401 + ... + 92080.

Almost surely, 2^844488040 is an apocalyptic number.

It is an amenable number.

844488040 is an abundant number, since it is smaller than the sum of its proper divisors (1244061500).

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

844488040 is a wasteful number, since it uses less digits than its factorization.

844488040 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 174514 (or 174499 counting only the distinct ones).

The product of its (nonzero) digits is 131072, while the sum is 40.

The square root of 844488040 is about 29060.0763935679. The cubic root of 844488040 is about 945.2162247958.

It can be divided in two parts, 844 and 488040, that added together give a palindrome (488884).

The spelling of 844488040 in words is "eight hundred forty-four million, four hundred eighty-eight thousand, forty".