3721860 has 144 divisors (see below), whose sum is σ = 12579840. Its totient is φ = 887040.

The previous prime is 3721859. The next prime is 3721873. The reversal of 3721860 is 681273.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 120045 + ... + 120075.

It is an arithmetic number, because the mean of its divisors is an integer number (87360).

Almost surely, 2^3721860 is an apocalyptic number.

3721860 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 3721860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6289920).

3721860 is an abundant number, since it is smaller than the sum of its proper divisors (8857980).

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

3721860 is a wasteful number, since it uses less digits than its factorization.

3721860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 98 (or 93 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 3721860 is about 1929.2122744789. The cubic root of 3721860 is about 154.9720379667.

The spelling of 3721860 in words is "three million, seven hundred twenty-one thousand, eight hundred sixty".