3721730 has 8 divisors (see below), whose sum is σ = 6699132. Its totient is φ = 1488688.

The previous prime is 3721727. The next prime is 3721741. The reversal of 3721730 is 371273.

It can be written as a sum of positive squares in 2 ways, for example, as 3157729 + 564001 = 1777^2 + 751^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a junction number, because it is equal to n+sod(n) for n = 3721696 and 3721705.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 186077 + ... + 186096.

Almost surely, 2^3721730 is an apocalyptic number.

3721730 is a deficient number, since it is larger than the sum of its proper divisors (2977402).

3721730 is a wasteful number, since it uses less digits than its factorization.

3721730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 372180.

The product of its (nonzero) digits is 882, while the sum is 23.

The square root of 3721730 is about 1929.1785816767. The cubic root of 3721730 is about 154.9702336180.

The spelling of 3721730 in words is "three million, seven hundred twenty-one thousand, seven hundred thirty".