3668869620 has 384 divisors, whose sum is σ = 13229153280. Its totient is φ = 836075520.

The previous prime is 3668869613. The next prime is 3668869621. The reversal of 3668869620 is 269688663.

3668869620 is a `hidden beast` number, since 3 + 6 + 6 + 8 + 8 + 6 + 9 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3668869621) 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 127 ways as a sum of consecutive naturals, for example, 8472924 + ... + 8473356.

It is an arithmetic number, because the mean of its divisors is an integer number (34450920).

Almost surely, 2^3668869620 is an apocalyptic number.

3668869620 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 3668869620, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6614576640).

3668869620 is an abundant number, since it is smaller than the sum of its proper divisors (9560283660).

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

3668869620 is a wasteful number, since it uses less digits than its factorization.

3668869620 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 552 (or 544 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The square root of 3668869620 is about 60571.1946390361. The cubic root of 3668869620 is about 1542.3304262450.

The spelling of 3668869620 in words is "three billion, six hundred sixty-eight million, eight hundred sixty-nine thousand, six hundred twenty".