3720223817520 has 320 divisors, whose sum is σ = 13737500934144. Its totient is φ = 814916090880.

The previous prime is 3720223817509. The next prime is 3720223817543. The reversal of 3720223817520 is 257183220273.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 5017479 + ... + 5711001.

Almost surely, 2^{3720223817520} is an apocalyptic number.

3720223817520 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 3720223817520, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6868750467072).

3720223817520 is an abundant number, since it is smaller than the sum of its proper divisors (10017277116624).

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

3720223817520 is a wasteful number, since it uses less digits than its factorization.

3720223817520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693680 (or 693674 counting only the distinct ones).

The product of its (nonzero) digits is 282240, while the sum is 42.

The spelling of 3720223817520 in words is "three trillion, seven hundred twenty billion, two hundred twenty-three million, eight hundred seventeen thousand, five hundred twenty".