3827721 has 8 divisors (see below), whose sum is σ = 5372320. Its totient is φ = 2417472.

The previous prime is 3827701. The next prime is 3827723. The reversal of 3827721 is 1277283.

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

It is not a de Polignac number, because 3827721 - 2⁶ = 3827657 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (3827723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 33520 + ... + 33633.

It is an arithmetic number, because the mean of its divisors is an integer number (671540).

Almost surely, 2^3827721 is an apocalyptic number.

It is an amenable number.

3827721 is a deficient number, since it is larger than the sum of its proper divisors (1544599).

3827721 is a wasteful number, since it uses less digits than its factorization.

3827721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 67175.

The product of its digits is 4704, while the sum is 30.

The square root of 3827721 is about 1956.4562351354. The cubic root of 3827721 is about 156.4276154079.

The spelling of 3827721 in words is "three million, eight hundred twenty-seven thousand, seven hundred twenty-one".