3644527420 has 24 divisors (see below), whose sum is σ = 7711936848. Its totient is φ = 1446681600.

The previous prime is 3644527373. The next prime is 3644527421. The reversal of 3644527420 is 247254463.

It is a self number, because there is not a number n which added to its sum of digits gives 3644527420.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644527421) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 692901 + ... + 698140.

It is an arithmetic number, because the mean of its divisors is an integer number (321330702).

Almost surely, 2^3644527420 is an apocalyptic number.

It is an amenable number.

3644527420 is an abundant number, since it is smaller than the sum of its proper divisors (4067409428).

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

3644527420 is a wasteful number, since it uses less digits than its factorization.

3644527420 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1391181 (or 1391179 counting only the distinct ones).

The product of its (nonzero) digits is 161280, while the sum is 37.

The square root of 3644527420 is about 60369.9214841298. The cubic root of 3644527420 is about 1538.9118388107.

The spelling of 3644527420 in words is "three billion, six hundred forty-four million, five hundred twenty-seven thousand, four hundred twenty".