3644944842 has 64 divisors (see below), whose sum is σ = 9177053184. Its totient is φ = 937535040.

The previous prime is 3644944841. The next prime is 3644944843. The reversal of 3644944842 is 2484494463.

It is an interprime number because it is at equal distance from previous prime (3644944841) and next prime (3644944843).

It is a junction number, because it is equal to n+sod(n) for n = 3644944791 and 3644944800.

It is not an unprimeable number, because it can be changed into a prime (3644944841) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 9288 + ... + 85884.

It is an arithmetic number, because the mean of its divisors is an integer number (143391456).

Almost surely, 2^3644944842 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3644944842, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4588526592).

3644944842 is an abundant number, since it is smaller than the sum of its proper divisors (5532108342).

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

3644944842 is a wasteful number, since it uses less digits than its factorization.

3644944842 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76723.

The product of its digits is 2654208, while the sum is 48.

The square root of 3644944842 is about 60373.3785869236. The cubic root of 3644944842 is about 1538.9705891013.

The spelling of 3644944842 in words is "three billion, six hundred forty-four million, nine hundred forty-four thousand, eight hundred forty-two".