3721870 has 16 divisors (see below), whose sum is σ = 6733440. Its totient is φ = 1481184.

The previous prime is 3721859. The next prime is 3721873. The reversal of 3721870 is 781273.

It is a happy number.

3721870 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3721873) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1396 + ... + 3064.

It is an arithmetic number, because the mean of its divisors is an integer number (420840).

Almost surely, 2^3721870 is an apocalyptic number.

3721870 is a deficient number, since it is larger than the sum of its proper divisors (3011570).

3721870 is a wasteful number, since it uses less digits than its factorization.

3721870 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1899.

The product of its (nonzero) digits is 2352, while the sum is 28.

The square root of 3721870 is about 1929.2148662085. The cubic root of 3721870 is about 154.9721767610.

The spelling of 3721870 in words is "three million, seven hundred twenty-one thousand, eight hundred seventy".