3821184720 has 140 divisors (see below), whose sum is σ = 13320491556. Its totient is φ = 1018967040.

The previous prime is 3821184701. The next prime is 3821184721. The reversal of 3821184720 is 274811283.

It can be written as a sum of positive squares in 2 ways, for example, as 1783203984 + 2037980736 = 42228^2 + 45144^2 .

It is a super-2 number, since 2×3821184720² = 29202905328722956800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3821184721) by changing a digit.

It is a polite number, since it can be written in 27 ways as a sum of consecutive naturals, for example, 25560 + ... + 91080.

Almost surely, 2^3821184720 is an apocalyptic number.

3821184720 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 3821184720, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6660245778).

3821184720 is an abundant number, since it is smaller than the sum of its proper divisors (9499306836).

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

3821184720 is an equidigital number, since it uses as much as digits as its factorization.

3821184720 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65552 (or 65531 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 36.

The square root of 3821184720 is about 61815.7319781947. The cubic root of 3821184720 is about 1563.3852521263.

The spelling of 3821184720 in words is "three billion, eight hundred twenty-one million, one hundred eighty-four thousand, seven hundred twenty".