3728201840 has 80 divisors (see below), whose sum is σ = 9530818560. Its totient is φ = 1344994560.

The previous prime is 3728201837. The next prime is 3728201849. The reversal of 3728201840 is 481028273.

It is a tau number, because it is divible by the number of its divisors (80).

It is a self number, because there is not a number n which added to its sum of digits gives 3728201840.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3728201849) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 95081 + ... + 128439.

It is an arithmetic number, because the mean of its divisors is an integer number (119135232).

Almost surely, 2^3728201840 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 3728201840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4765409280).

3728201840 is an abundant number, since it is smaller than the sum of its proper divisors (5802616720).

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

3728201840 is a wasteful number, since it uses less digits than its factorization.

3728201840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33510 (or 33504 counting only the distinct ones).

The product of its (nonzero) digits is 21504, while the sum is 35.

The square root of 3728201840 is about 61059.0029397795. The cubic root of 3728201840 is about 1550.6000923023.

The spelling of 3728201840 in words is "three billion, seven hundred twenty-eight million, two hundred one thousand, eight hundred forty".