3644766620 has 48 divisors (see below), whose sum is σ = 8371490400. Its totient is φ = 1321931520.

The previous prime is 3644766589. The next prime is 3644766623. The reversal of 3644766620 is 266674463.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3644766623) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 64286 + ... + 106874.

It is an arithmetic number, because the mean of its divisors is an integer number (174406050).

Almost surely, 2^3644766620 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 3644766620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4185745200).

3644766620 is an abundant number, since it is smaller than the sum of its proper divisors (4726723780).

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

3644766620 is a wasteful number, since it uses less digits than its factorization.

3644766620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42998 (or 42996 counting only the distinct ones).

The product of its (nonzero) digits is 870912, while the sum is 44.

The square root of 3644766620 is about 60371.9025706495. The cubic root of 3644766620 is about 1538.9455056959.

The spelling of 3644766620 in words is "three billion, six hundred forty-four million, seven hundred sixty-six thousand, six hundred twenty".