5644531420 has 96 divisors (see below), whose sum is σ = 13806023616. Its totient is φ = 1931663360.

The previous prime is 5644531351. The next prime is 5644531427. The reversal of 5644531420 is 241354465.

It is a hoax number, since the sum of its digits (34) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (34).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5644531427) 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, 446304 + ... + 458776.

It is an arithmetic number, because the mean of its divisors is an integer number (143812746).

Almost surely, 2^5644531420 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 5644531420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6903011808).

5644531420 is an abundant number, since it is smaller than the sum of its proper divisors (8161492196).

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

5644531420 is a wasteful number, since it uses less digits than its factorization.

5644531420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12532 (or 12508 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 34.

The square root of 5644531420 is about 75130.0966324415. The cubic root of 5644531420 is about 1780.5026796412.

Adding to 5644531420 its reverse (241354465), we get a palindrome (5885885885).

The spelling of 5644531420 in words is "five billion, six hundred forty-four million, five hundred thirty-one thousand, four hundred twenty".