3644199420 has 96 divisors (see below), whose sum is σ = 10677596160. Its totient is φ = 927521280.

The previous prime is 3644199409. The next prime is 3644199443. The reversal of 3644199420 is 249914463.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 122361 + ... + 149199.

It is an arithmetic number, because the mean of its divisors is an integer number (111224960).

Almost surely, 2^3644199420 is an apocalyptic number.

3644199420 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 3644199420, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (5338798080).

3644199420 is an abundant number, since it is smaller than the sum of its proper divisors (7033396740).

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

3644199420 is a wasteful number, since it uses less digits than its factorization.

3644199420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26955 (or 26953 counting only the distinct ones).

The product of its (nonzero) digits is 186624, while the sum is 42.

The square root of 3644199420 is about 60367.2048383889. The cubic root of 3644199420 is about 1538.8656711216.

The spelling of 3644199420 in words is "three billion, six hundred forty-four million, one hundred ninety-nine thousand, four hundred twenty".